Inconsistent double pane management

On small screens, the last-clicked pane is displayed when only one pane is shown.

Screen_recording_20230921_165100.mp4

Screen_recording_20230921_165158.mp4

added BacklogMedium SprintTo review bug labels

assigned to @pnicolas

mentioned in commit 512e69c2

added SprintDone label and removed SprintTo review label

closed