[Bug 52532] New: SDL 2.0.20 doesn't restore fullscreen mode when restoring a window

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52532

Bug ID: 52532
           Summary: SDL 2.0.20 doesn't restore fullscreen mode when
                    restoring a window
           Product: Wine
           Version: 7.1
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Same testcase as bug 52519.

SDL will, in some cases, minimize fullscreen windows when they are deactivated.
If this happens in SDL 2.0.20, the window will not be fullscreen when it is
restored.

To reproduce the bug:
* Run the test program in Wine with SDL_EVENT_LOGGING=1
* Click the window to fullscreen it.
* Alt+tab to another window.
* Restore the test program's window.
* It appears with a windowed size rather than fullscreen.

Based on logs, I believe that SDL is requesting a fullscreen size and position,
but Wine never requests NET_WM_STATE_FULLSCREEN. I'm not sure why.