This is especially apparent when full screen on a big monitor. Currently, we do a ton of stuff on every dragMouseMoved. The repainting of the overlay was optimized previously, but I believe the most expensive operation now is likely searching for a dockable at the mouse position.

• Update root handles
• Update dockable handles
• Find dockable at mouse position
• Find tabbed pane target
• Change visibility of utility frames
• Update overlay