App Watcher: Check Update

Apr 24, 2018

1.21:
- Filter watching apps in 'On device' section
- Fix developer name in details
1.20:
- Hotfix for no updates following play store changes (Version name is not available anymore)
- Improve performance of the app, hereupon moved 'Update All' into action bar menu
- Accent color for notification
- App info shortcut in details
- New settings: disable pull-to-refresh, default filter screen
- Min sdk 16