Forms cannot rely purely on a rect check for mouse clicks as drop-downs may extend beyond it. Fixes #602

form.go

@@ -621,10 +621,6 @@ func (f *Form) focusIndex() int {
 // MouseHandler returns the mouse handler for this primitive.
 func (f *Form) MouseHandler() func(action MouseAction, event *tcell.EventMouse, setFocus func(p Primitive)) (consumed bool, capture Primitive) {
 	return f.WrapMouseHandler(func(action MouseAction, event *tcell.EventMouse, setFocus func(p Primitive)) (consumed bool, capture Primitive) {
-		if !f.InRect(event.Position()) {
-			return false, nil
-		}
-
 		// At the end, update f.focusedElement and prepare current item/button.
 		defer func() {
 			if consumed {
@@ -651,7 +647,7 @@ func (f *Form) MouseHandler() func(action MouseAction, event *tcell.EventMouse,
 
 		// A mouse click anywhere else will return the focus to the last selected
 		// element.
-		if action == MouseLeftClick {
+		if action == MouseLeftClick && f.InRect(event.Position()) {
 			consumed = true
 		}