FEAT: Enable customisation of Thumbnail Background action

[D34thm0u53]

Summary of changes:

• Removed Action level config for non-functional settings:
  • Show name of the playing song.
  • Show thumbnail of the playing song.
• Avoid redrawing every tick, instead only refresh when a change has been detected.
• Allow users to choose from the following modes for the size of the thumbnail:
  • Grid Modes:
    • 1x1
    • 2x2
    • 3x3
    • 4x4
  • Fill Modes:
    • Stretch to Fit
    • Fill Screen - Centered (Preserve Aspect Ratio)
• Allow Users to have multiple thumbnails displayed on a single page of a deck.
• Added a plugin level log wrapper to allow for log level control
• Added plugin level settings for:
  • Composite Timeout
  • Log Level

Resolved Issues:

• Thumbnail would redraw every tick.
• Thumbnail background would not be cleared from the deck on removal of action via the red "Remove Action" button in UI.
• Option to disable whole-deck media image display #11