got inspired by: L3v3L/vs-focus.
spotline.apply ( ctrl+f8 ) blurs unselected lines.
- if this command is executed while other lines are already blurred, the blur will be cleared.
spotline.reset ( ctrl+shift+f8 ) clears all blur.
Currently known issues
- Switching tabs resets the blur. In order to reapply,
spotline.apply must be run again.