HumHub v1.18.3 release notes

Fix #8079: Hide wall entry topics container when no topics
Fix #8075: Filtering by Global Topic in Dashboard
Fix #8081: Adds null check for removeItem and appendItem.
Fix #8086: Fix Daylight Saving Time issue in DbDateValidator
Fix #8090: Show only visible groups on the profile field “Group memberships”
Fix #8091: Bypass StreamViewer::$showFilters when topics query param is present
Fix #8093: Fix Yii2 debug panel
Enh #8095: Improve authorization checks
Fix #8099: Validate content visibility before switching content notifications
Enh #8098: Improve notification authorization checks
Enh #8088: Improve people/space filters
Enh #8105: Fix adding of new individual user and space topics
Fix #8107: Hide option “Update Space memberships” on administrative group edit form
Enh #8106: Ensure migrations are run after reinstallation of enabled modules
Enh #8114: Fix old theme updating migration
Enh #8120: Allow using filter toggling in modals
Fix #8118: Keep list start number on RichText rendering
Enh #8113: Optimize user space membership lookups
Enh #8114: Fix old theme updating migration
Enh #8122: Update PHPspreadsheet
Enh #8112: Update Mobile-Detect library to 4.10.0
Fix #8125: Show oEmbed warning only for supported embed URLs
Enh #8131: Support video and audio tags by RichText converters
Fix #8134: Revert “Improve <p> style in RichText editor”
Fix #8133: Rebuild search index after file updating
Fix #8132: Improve RichText styles in email message
Fix #8135: Missing border around profile pictures in Spaces overview
Fix #8136: Missing vertical paddings in Followers / Following snippets
Enh #8140: Preserve selected profile columns in pending approvals
Fix #8143: Fix updating of Space memberships for existing members
Fix #8145: Preserve login return URL for PJAX requests
Fix #8144: Restrict file view action
Enh #8156: Enhance behavior for vertical videos and multiple video attachments
Fix #8148: Yii2 2.0.55 compatibility
Fix #8163: Fix remove all space members permission
Fix #8164: Fix space members list visibility