beremiz

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.
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<font size="3">The PLCopen Editor saves and loads XML projects,<BR>accordingly to PLCopen TC6-XML Schemes.</font>
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More informations on :
<a href="http://www.beremiz.org/">http://www.beremiz.org/</a>
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