Fixes and improvements
- Add PKCE support for OpenID Connect (#134) (@onyedikachi-david)
- Fix settings panel on tablet-sized screens (#121)
- Fix question counting for quiz component
- Fix embed deletion bad keys for attendees
- Fix event name length validation (min: 5, max: 50)
- Fix event code length validation (min: 5, max: 10)
- Fix presentation upload progress when editing an event