Good improvement in my opinion!
My test results:

• The CTRL+SHIFT+UP/DOWN shortcuts work perfectly. Only when unfocusing the navigation bar a second time, the edit mode stays on. It might be a widget problem, but i consider it minor and it happened also before this patch.
• Then i set CTRL+UP/DOWN as alternative shortcuts for the same actions to see if this can be used for backwards compatibility: This does not work when trying to unfocusing the navigation bar, the embedded terminal or the command line. All these widgets are capturing the key press and the shortcut action is not activated.

Thanks for the fix Davide! This was also annoying me a lot.

Thanks Toni. Works as expected.
But i still would recommend to either use btnCompareDirs->setFocus(); directly instead, or to add a short comment that syncList is focused to have the compare dirs button (which is set as default) being executed on pressing "Enter".
Otherwise it is a bit confusing why the empty tree widget is focused.

I removed the two added brackets again.

• fixup! Add Kompare as compare application with KIO support

[Got finally some time for Krusader again:)]