private void windowToolStripMenuItem_DropDownOpening(object sender, EventArgs e)
{
var items = windowToolStripMenuItem.DropDownItems;
while (items.Count > 2)
items.RemoveAt(items.Count - 1);
WindowButtons = new Dictionary<ToolStripItem, Form>();
bool prevHadAny = AddForms(false, IffManager.ResourceWindow.Values);
prevHadAny = AddForms(prevHadAny, BHAVManager.Editors.Values);
prevHadAny = AddForms(prevHadAny, BHAVManager.Tracers.Values);
}