Fix non consistent Wayland compositors (#1437)

Crostini seems to allow querying the currently active monitor, but not
the position of the window. This way Neovide previously thought "ah yes,
then I can just walk in and reposition" while it actually couldn't.

src/window/mod.rs

@@ -350,15 +350,15 @@ pub fn create_window() {
     let window = windowed_context.window();
 
     // Check that window is visible in some monitor, and reposition it if not.
-    if let Some(current_monitor) = window.current_monitor() {
+    let did_reposition = window
+        .current_monitor()
+        .and_then(|current_monitor| {
             let monitor_position = current_monitor.position();
             let monitor_size = current_monitor.size();
             let monitor_width = monitor_size.width as i32;
             let monitor_height = monitor_size.height as i32;
 
-        let window_position = window
-            .outer_position()
-            .expect("Could not get window position");
+            let window_position = window.outer_position().ok()?;
             let window_size = window.outer_size();
             let window_width = window_size.width as i32;
             let window_height = window_size.height as i32;
@@ -370,7 +370,12 @@ pub fn create_window() {
             {
                 window.set_outer_position(monitor_position);
             }
-    }
+
+            Some(())
+        })
+        .is_some();
+
+    log::trace!("repositioned window: {}", did_reposition);
 
     let scale_factor = windowed_context.window().scale_factor();
     let renderer = Renderer::new(scale_factor);