Quick fix for #9119. Increase preview to keep empty message more centered

Fixes for filepicker

traverse folders in php to search in shared files

Use svg mimeicons for empty text files

Fix notification preventing top bar clickability

don't preload videos on public sharing, fixes #10042

extract transparency fix from #8050

Fix silent crash if 3rdparty dir is not available

Also keep maxY into account when scaling a preview while preserving aspect ratio

add support for webdav copy to the encryption and versions app

Cache factory needs to use globalPrefix in createLowLatency()

Sharing set expire date

only if the environment variable RUN_OBJECTSTORE_TESTS is set the object...

also use link icon for the folders ..

migration test for sqlite - adding type mapping for 'tinyint unsigned'

Fix template rendering for 'blank' templates