[Bug] Tab key doesn't work after moving Explorer tab to the opposite panel

[Jungle]

1. Move some tab to the opposite panel
2. Press Tab key

Result: Focus doesn't move to the opposite panel. Moreover, if the preeceding panel was not previously opened it is opened empty (see gif)

3. Click mouse in the opposite panel to activate it
4. Press Tab again

Result: the opposite panel is activated but no file/folder is not focused. This only seems to work on fresh MC start.

[Matthias515566]

See also: http://forum.multicommander.com/forum/index.php/topic,1676.0.html