Sync maximized state from top-level configure event for a wayland window

[aki237]

• Otherwise is_maximized always returns true

Release Notes:

• Fixed maximized state. Tested with a dummy maximize/restore button with the zoom() (not implemented yet). Without the right maximized, in toggle zoom function is not possible to call set_maximized() or unset_maximized().

    fn zoom(&self) {
      if self.is_maximized() {
        self.borrow_mut().toplevel.unset_maximized();
      } else {
        self.borrow_mut().toplevel.set_maximized();
      }
    }

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[aki237]

@cla-bot check

[cla-bot]

The cla-bot has been summoned, and re-checked this pull request!

[aki237]

Sorry for the commits, I was working on a PoC for draggable wayland windows, accidently pushed it to this branch.

[mikayla-maki]

Thank you!