Implement right-side preview component in karaoke setting subscription.

[andy840119]

In each SettingsSubsection, it should have preview component can let user to see the instruction or preview the change.
And here's the list of component should be created eventually:

• Config
  • Common -> ???
  • Note -> show the note playfield with notes appear, maybe with one second one note. with random place?
  • Lyric -> show drawable lyric text.
• Style
  • Lyric -> with preview lyric, time is freeze, or time is adjustable?
  • Note -> with preview note playfield, time freeze.
  • Manage font -> might have instruction to show how to import font in right side, not sure should show all available font.
• Scoring
  • Device -> might display tone and microphone volumn in right side.
  • Pitch -> ???