private void TextChangeTimerHandler(object sender, EventArgs e)
        {
            if (SearchModifications.FixedSearch)
            {
                SearchModifications.FilterTree(SearchFixMod, FixedModsTreeView, FixedModTypeForTreeViewObservableCollection);
                SearchModifications.FixedSearch = false;
            }

            if (SearchModifications.VariableSearch)
            {
                SearchModifications.FilterTree(SearchVarMod, VariableModsTreeView, VariableModTypeForTreeViewObservableCollection);
                SearchModifications.VariableSearch = false;
            }
        }