Jonas Ådahl authored Nov 02, 2021 and Rastersoft committed Jan 08, 2022

The desktop icons extension can get into a state where the desktop no longer
takes mouse input.

This happens if a user starts a rubber banding operation and then drags
the mouse to somewhere on screen that has a pop up menu, and then pops
the menu up.

This commit addresses the bug by limiting the grab actor to the
backgrounds, and by explicitly ending the rubber banding operation
when one of the icons own menus is shown.

One side effect of limiting the grab actor to the backgrounds, is the
rubber banding code never gets to see motion outside of the backgrounds
anymore. In order to keep drag operations feeling fluid when the user moves
toward the edge of the screen, this commit also overrides the
grab helpers captured-event handler so those motion events keep coming.

We also start to end the rubber band if for any reason the grab it had
was released.