I just looked at the video guide of 10.2.0.0 and found out that now I can drag folder tabs between windows. Since when is that possible? This is great feature and I somehow missed it reading changelog!
My suggestions:
Is that possible that lister window didn't get focus if I click&drag folder tab, so it doesn't appear in the front of window I want to drag the tab to. In the example above I would like to move folder tab "2" from bottom window to the one on top. But if I drag it, the bottom window will become the topmost.
Dragging tab out of the window should result in splitting it to new lister.
Dragging the only tab out of dual-display window (when "always show tab bar" is enabled) should result in splitting to new lister the same way it does when splitting to new lister from tab context menu (the original lister window should switch back to single-display).
Oops, sorry, it works a bit different than I thought. I just wanted it to switch to single-display while splitting means move current tab and all tabs to the right to the new lister.
Middle clicking the last tab in dual-display should also switch to single-display. Also, there should be an option in context menu to close the last tab when in dual mode.
New suggestion:
I think there should be an easy way to set one of tabs in single display as destination folder.
I know that it's currently impossible to make one tab a source and the other destination within one window in single display. So my idea is double-click on tab makes it open this tab in dual display so the double-clicked tab works as destination.
Just an idea, as far as I can see I can achieve it using GO TABMOVE command.