The concept of a "title bar" / "status bar" shouldn't be a core concept,
so remove the Host_UpdateStatusBar function, and move the code handles
whether to update the status bar or titlebar into DolphinWX.
This was actually never used as far as I can tell. There was no wx event handling done whatsoever for the global ID, So this is basically a dead function.
This ensures the transition from/to exclusive mode happens while the RenderFrame is fullscreen.
This prevents fullscreen loops and relieves us of having to restore the window size after we exit fullscreen.
We can't use RendererHasFocus for this purpose because of some issues
with exclusive fullscreen, and the new RendererHasFocus implementation
didn't work for non-Render to Main Window cases, since the renderer
window wasn't managed by wx.
This function isn't used any more and it shouldn't be used at all as it generates a sync request to the x11 server. So it has to wait for a complete round trip time.
