* swipe: Fix previous workspace remembering in workspace gesture
Fixes a bug that previous workspace does not exist after swiping to a workspace
* tests: Test that `workspace previous` works after workspace gesture
* moveActiveToWorkspace: remember previous workspace unconditionally
Renames `misc:new_window_takes_over_fullscreen` into
`misc:on_focus_under_fullscreen` and implements the following behavior:
- By default, when a tiling window is being focused on a workspace where
a fullscreen/maximized window exists, respect
the `misc:on_focus_under_fullscreen` config variable.