Context menus

[bill-ahmed]

Added support for:

• Context menus
  • Includes actions such as pause, resume, delete, priority, force recheck, etc.
  • Screenshot:
  • 
• More snackbar notifications
  • Notifications enabled by default now
  • Will trigger with actions such as pausing, resuming, moving, etc.
• Trigger a recheck for any number of torrents

Resolves #107, #108, #115

[bill-ahmed]

Todo: Removing stylesheet for fonts reverted back to what the browser supports. Might still need to include them locally for browser compatibility.