fly key capture lets shift, ctrl and alt through, so the play-here crosshair no longer sticks after flying fast

src/main/java/com/eliasmueller/llamamod/editor/render/Viewport.java

@@ -110,7 +110,9 @@ public final class Viewport extends JPanel {
         } else if (e.getID() == KeyEvent.KEY_RELEASED) {
             keys.remove(e.getKeyCode());
         }
-        return true;
+        // modifiers pass on (others track Shift, e.g. the play-here crosshair); typed keys do not
+        int k = e.getKeyCode();
+        return k != KeyEvent.VK_SHIFT && k != KeyEvent.VK_CONTROL && k != KeyEvent.VK_ALT && k != KeyEvent.VK_META;
     };
 
     @Override