v2.10.0+13

What's Changed

• Improve vp by @kurwjan in #64
• Add error widget on unexpected errors by @kurwjan in #87
• Calendar improvements by @kurwjan in #88
• Add no entries view for vp by @kurwjan in #92
• Countly by @alessioC42 in #91
• fix notifications not working due to API changes by @alessioC42 in #93
• datenschutzerklärung by @alessioC42 in #94
• Conversations improvement by @kurwjan in #89
• 63 possible problems with teacher accounts by @alessioC42 in #97
• Better login screen by @alessioC42 in #95

Full Changelog: v2.9.3+12...v2.10.0+13