Support for a single pane multicommander.

[Jean]

As far as i can see the only trouble using a single pane is the dialog windows for pack, unpack, search files *sometimes* don't show up. Makes it a nuisance anyway.
Great software, hope to get to know it more.

[Jean]

For the pack dialog, it turns out that the other pane must have a focused explorer panel, else the dialog will not show up. If the other pane has explorer panels but for instance the file search has focus, the dialog will not show up.

[Matthias515566]

Nobody need a single panel explorer.