Crash when trying to move/resize LibreOffice slide show window #117
Description
LibreOffice Impress does some black magic with its slide show window (F5), because it's not an actual window in fullscreen, but something else...
As a result, when we try grabbing it for a move or resize (modkey + left/right click), it crashes plwm.
Proposed solution: before trying to do anything with the clicked object, check if it's a mapped window.
Side-note: the slide show is always visible on top even if I switch workspace, also it eats all input on its screen. This is intended behaviour and the same is observed in dwm.