FEATURE: redeem Invite when user sign up
Add tests for redeem invite feature
Add create admin instructions in install guide
Fix not all content in reply panel visible due to panel overflowing on small Androids with keyboard up
Merge pull request #2515 from borhub/fix-compose-panel-overflow-on-800x480-android

Mobile: Fix parts of reply panel out of viewport
Merge pull request #2514 from techAPJ/patch-1

Add "create admin" instruction in install guide
Merge pull request #2501 from techAPJ/bulk-invite-5

FEATURE: redeem Invite when user sign up