🔖 concrexit v21

Errors resolved

• Fix new event saving (!1117 (merged))
• Block creation of more mailinglists because they're automatic (!1116 (merged))
• Sort member list always alphabetically (!1115 (merged))
• Use thumbnailer everywhere for partners (!1114 (merged))
• Fix paid status sorting pizzas (!1113 (merged))
• Do not send membership notifications for future members (!1111 (merged))
• Prevent changes to price and registration start after registration has started (!1105 (merged))
• Fix unpublished events feed (!1103 (merged))
• Save event first before creating notifications when adding (!1100 (merged))
• Make the slider responsive to hold a steady aspect ratio of 2.5 (!1099 (merged))
• Add rel=noopener where target=_blank (!1094 (merged))
• Correctly align members and photos search forms (!1093 (merged))
• Fix thabloid filtering column/rows (!1092 (merged))
• Changed List View in Calendar (!1091 (merged), !1106 (merged)) events

New functionality

• Add language to summary data (!1060 (merged)) priority: medium
• Added admin serializer for the event registrations (!1110 (merged)) events api
• Add admin group to NextCloud api (!1107 (merged), !1108 (merged))
• Add APIs for NextCloud user sync (!1098 (merged))
• Added document support to events (!1080 (merged))
• Scheduled notifications for pizza events (!920 (merged)) push notifications

Technical changes

• Move prepopulated fields back to original implementation (!1104 (merged))
• Add test to verify sitemap does not throw error status (!1102 (merged))
• Only tag latest docker tag on release (!1097 (merged))
• Switch to docker hub for images (!1096 (merged))