// ------[ LOGIN PROMPT ]------
        protected virtual void LayoutSubmissionFields()
        {
            using (new EditorGUI.DisabledScope(isAwaitingServerResponse))
            {
                // - Account Header -
                EditorGUILayout.BeginHorizontal();
                {
                    if (this.user == null)
                    {
                        EditorGUILayout.LabelField("Not logged in to mod.io");
                        GUILayout.FlexibleSpace();
                        if (GUILayout.Button("Log In"))
                        {
                            LoginWindow.GetWindow <LoginWindow>("Login to mod.io");
                        }
                    }
                    else
                    {
                        EditorGUILayout.LabelField("Logged in as:  " + this.user.username);
                        GUILayout.FlexibleSpace();
                        if (GUILayout.Button("Log Out"))
                        {
                            EditorApplication.delayCall += () =>
                            {
                                if (EditorDialogs.ConfirmLogOut(this.user.username))
                                {
                                    this.user = null;

                                    APIClient.userAuthorizationToken = null;
                                    CacheClient.DeleteAuthenticatedUser();

                                    isAwaitingServerResponse = false;

                                    Repaint();
                                }
                            };
                        }
                    }
                }
                EditorGUILayout.EndHorizontal();

                EditorGUILayout.LabelField("", GUI.skin.horizontalSlider);

                // - Submission Section -
                if (!String.IsNullOrEmpty(uploadSucceededMessage))
                {
                    EditorGUILayout.HelpBox(uploadSucceededMessage,
                                            MessageType.Info);
                }
                else if (!String.IsNullOrEmpty(uploadFailedMessage))
                {
                    EditorGUILayout.HelpBox(uploadFailedMessage,
                                            MessageType.Error);
                }
                else if (profile == null)
                {
                    EditorGUILayout.HelpBox("Please select a mod profile as a the upload target.",
                                            MessageType.Info);
                }
                else if (profile.modId > 0)
                {
                    EditorGUILayout.HelpBox(profile.editableModProfile.name.value
                                            + " will be updated as used as the upload target on the server.",
                                            MessageType.Info);
                }
                else
                {
                    EditorGUILayout.HelpBox(profile.editableModProfile.name.value
                                            + " will be created as a new profile on the server.",
                                            MessageType.Info);
                }
                EditorGUILayout.Space();


                // TODO(@jackson): Support mods that haven't been downloaded?
                profile = EditorGUILayout.ObjectField("Mod Profile",
                                                      profile,
                                                      typeof(ScriptableModProfile),
                                                      false) as ScriptableModProfile;

                // - Build Profile -
                using (new EditorGUI.DisabledScope(profile == null))
                {
                    EditorGUILayout.BeginHorizontal();
                    if (EditorGUILayoutExtensions.BrowseButton(buildFilePath, new GUIContent("Modfile")))
                    {
                        EditorApplication.delayCall += () =>
                        {
                            string path = EditorUtility.OpenFilePanelWithFilters("Set Build Location",
                                                                                 "",
                                                                                 modBinaryFileExtensionFilters);

                            if (path.Length != 0)
                            {
                                buildFilePath = path;
                            }
                        };
                    }
                    if (EditorGUILayoutExtensions.ClearButton())
                    {
                        buildFilePath = string.Empty;
                    }
                    EditorGUILayout.EndHorizontal();

                    // - Build Profile -
                    using (new EditorGUI.DisabledScope(!System.IO.File.Exists(buildFilePath)))
                    {
                        // - Version -
                        EditorGUI.BeginChangeCheck();
                        buildProfile.version.value = EditorGUILayout.TextField("Version",
                                                                               buildProfile.version.value);
                        if (EditorGUI.EndChangeCheck())
                        {
                            buildProfile.version.isDirty = true;
                        }
                        // - Changelog -
                        EditorGUI.BeginChangeCheck();
                        EditorGUILayout.PrefixLabel("Changelog");
                        buildProfile.changelog.value = EditorGUILayoutExtensions.MultilineTextField(buildProfile.changelog.value);
                        if (EditorGUI.EndChangeCheck())
                        {
                            buildProfile.changelog.isDirty = true;
                        }
                        // - Metadata -
                        EditorGUI.BeginChangeCheck();
                        EditorGUILayout.PrefixLabel("Metadata");
                        buildProfile.metadataBlob.value = EditorGUILayoutExtensions.MultilineTextField(buildProfile.metadataBlob.value);
                        if (EditorGUI.EndChangeCheck())
                        {
                            buildProfile.metadataBlob.isDirty = true;
                        }
                    }

                    // TODO(@jackson): if(profile) -> show build list?
                    EditorGUILayout.Space();
                    EditorGUILayout.BeginHorizontal();
                    GUILayout.FlexibleSpace();
                    if (GUILayout.Button("Upload to Server"))
                    {
                        UploadToServer();
                    }
                    GUILayout.FlexibleSpace();
                    EditorGUILayout.EndHorizontal();
                }
            }
        }