fix: improve time codes hitbox and narrow window visibility

[Samillion]

Changes:

• Improve time codes hitbox in different scenarios
• Improve narrow window trigger

Known issues: [old issues, not caused by this PR]

• Hitbox width will not be accurate if font size for time codes changes drastically
  • Introduce width offset for user to control as an option in the future? ie: 10 or -10
• Using time_format=dynamic, with a video longer than one hour, once playback time reaches one hour or more, the hitbox doesn't get changed to match.
  • If you invoke milliseconds (right click) on/off, it is fixed
  • This hints that hitbox value isn't updated and needs a measure to request_init(), which is very expensive with playback time
  • I don't want to rush implementing a fix for this, so it will be added in a separate PR when a proper method is found

Applied fix for time codes width hitbox in dynamic time format: 01651f0
I'm certain there is a better method, but nothing comes to mind. This works and doesn't spam call request_init() needlessly.