feat: new error banner, qol

rust/src/modules/display_windows.rs

@@ -88,7 +88,9 @@ impl Display {
             settings.borrow_mut().resolution = Resolution::new(width, height);
         }
 
-        display_set.apply()?;
+        display_set.apply().map_err(
+            |_| anyhow!("The selected monitor has been disconnected or doesn't support the chosen display mode")
+        )?;
         displayz::refresh()?;
 
         log::debug!("prepare display: done");