unconstrain layer shell popups

also unconstrain popups from monitor's usable area

move ugglyness to client.h

improve client_from_wlr_surface()

add a new function to get a client from a wlr_surface

Check if XWayland client size_hints are NULL

fix segfault when dragging chromium tabs

add missing return in client_is_floating_type()

This causes all Xwayland clients to be treated as floating

improve floating detection

mostly copied from sway

Merge pull request #204 from djpohly/scenegraph3

merge scenegraph3

Merge branch 'main' into scenegraph

do not allow set client size less than its min size

constraint popups to its parent client

Closes: #146
Closes: #155

Merge branch 'main' into scenegraph

Merge branch 'fix-segfault-in-fullscreennotify'

don't use fullscreen event in fullscreennotify()

Merge pull request #181 from Armael/fix-client_set_tiled

fix client_set_tiled which is currently ignoring its "edges" argument

fix client_set_tiled, which was ignoring its "edges" argument

Merge branch 'main' into wlroots-next

simplify client_for_each_surface

All the XDG surface iterator does is iterate the main wlr_surface, then
iterate the popups.  If we inline that function, we can merge part of it
with the X11 case.

Merge branch 'main' into wlroots-next