Andrey Skvortsov <andrej.skvortzov@gmail.com> [Mon, 18 Apr 2016 19:08:29 +0300] rev 1480
fix issue, then it wasn't possible to remove functional blocks from
project using right click and popup menu.
The problem is that, PopupMenu was called using IDEFrame object and as
a result item in ProjectTree loosed focus and focus went to IDEFrame.
Therefore later functions couldn't detect which item in ProjectTree
was selected.