Stellula Kakopo (Hotfix 4)

Changes:

• Add full refresh game meta button to force refresh game meta files
  • legendary list-games --force-refresh
• Dynamically add filters in games head bar

Fixes:

• Fix error, if pypresence does not exist
• Fix but, if game meta exists but no widget
• Fix exit app in offline mode
• Fix errors in launch dialog, in case of a http error

Full Changelog: 1.8.3...1.8.4