18.0.9 RC1

[rullzer]

• [stable18] fix possible leaking scope in Flow #22411 Fix possible leaking scope in Flow
• [stable18] fix event icon sizes and text alignment #22415 Fix event icon sizes and text alignment
• [stable18] Combine body-login rules in theming and fix twofactor and guest styling on bright colors #22428 Combine body-login rules in theming and fix twofactor and guest styling on bright colors
• [stable18] Add php docs build script #22449 Add php docs build script
• [stable18] Fix clicks on actions menu of non opaque file rows in acceptance tests #22504 Fix clicks on actions menu of non opaque file rows in acceptance tests
• [stable18] set the mount id before calling storage wrapper #22518 Set the mount id before calling storage wrapper
• [stable18] Fix S3 error handling #22522 Fix S3 error handling
• [stable18] Only disable zip64 if the size is known #22538 Only disable zip64 if the size is known
• [stable18] Change free space calculation #22554 Change free space calculation
• [stable18] Do not keep the part file if the forbidden exception has no retry set #22561 Do not keep the part file if the forbidden exception has no retry set
• [stable18] Fix app password updating out of bounds #22570 Fix app password updating out of bounds
• [Security] Bump node-sass from 4.13.0 to 4.13.1 in /build #22572 Bump node-sass from 4.13.0 to 4.13.1 in /build
• [stable18] Upgrade icewind/smb to 3.2.7 #22582 Upgrade icewind/smb to 3.2.7
• [stable18] Use the correct root to determinate the webroot for the resource #22585 Use the correct root to determinate the webroot for the resource
• [Security] Bump node-sass from 4.13.0 to 4.13.1 #22595 Bump node-sass from 4.13.0 to 4.13.1
• firstrunwizard#398 Bump node-sass from 4.13.0 to 4.13.1
• notifications#731 Bump node-sass from 4.13.0 to 4.13.1
• recommendations#279 Bump node-sass from 4.13.0 to 4.13.1
• text#1002 Catch StorageNotAvailable exceptions
• text#991 Only overwrite Ctrl-f when text is focussed
• viewer#586 Set the X-Requested-With header on dav requests

[nickvergessen]

• Backport of Use the correct root to determinate the webroot for the resource #22550 would be nice to have in too