/// <summary>
/// Handler for a plan item click on the plan's context menu.
/// Add a skill to the plan.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void menuPlanItem_Click(object sender, EventArgs e)
{
ToolStripMenuItem planItem = (ToolStripMenuItem)sender;
var tag = (Pair <Plan, SkillLevel>)planItem.Tag;
var operation = tag.A.TryPlanTo(tag.B.Skill, tag.B.Level);
PlanHelper.PerformSilently(operation);
}