This update for nextcloud-desktop fixes the following issues:

Update to 3.1.2

  - desktop#2846 [stable-3.1] Handle SVG branded clients
  - desktop#2849 [stable-3.1] Default to colored systray on linux
  - desktop#2866 [stable-3.1] Add push notifications for file changes
  - desktop#2871 [stable-3.1] Start file conflict resolve dialog asynchronous
  - desktop#2878 [stable-3.1] Use push notifications for Tray activities/notifications fetch trigger.
  - desktop#2709 [stable-3.1] Have the new account wizard open again
  - desktop#2715 [stable-3.1] UserModel: check indices are inside the user list
  - desktop#2716 [stable-3.1] Use the icon color property to color the icons in the tray window header.
  - desktop#2717 [stable-3.1] Ensure a sync happens after a conflict resolution
  - desktop#2730 [stable-3.1] Make monochrome icons the default on Linux and Mac OS.
  - desktop#2753 [stable-3.1] Fixed the autostart for AppImages. See #2504.
  - desktop#2221 Make QML code more declarative by using properties
  - desktop#2497 MacOS: Fix memory leak in FolderWatcherPrivate::startWatching
  - desktop#2500 Windows MSI: Update Docs & add SKIPAUTOUPDATE property
  - desktop#2512 Handle redirects when downloading updates
  - desktop#2514 Make it easier for user to provide debug information
  - desktop#2520 Handle ask for optional password capability
  - desktop#2521 Use friendly user agent during authentication
  - desktop#2527 Improve conflict handling gui
  - desktop#2530 Repair the Windows build
  - desktop#2531 Bring back the "Pause sync" action in the systray context menu
  - desktop#2534 Connection wizard improvements
  - desktop#2540 Add last / to exclude list file path.
  - desktop#2541 Don't use nullptr for QFlags
  - desktop#2542 Avoid string translation puzzle
  - desktop#2543 Update bookmarks location
  - desktop#2551 Fix share dialog animation for enforced password policy
  - desktop#2568 Fix crash when clicking on folder with status 403 in the main dialog.
  - desktop#2572 Avoid depth infinity propfind for e2ee
  - desktop#2575 Expose branding values to qtquick
  - desktop#2580 Delay initialization of SettingsDialog
  - desktop#2581 Ensure we quickly show/hide the systray window on startup
  - desktop#2582 Also output the event flags in the debug logs
  - desktop#2586 L10n: Add a space in generalsettings.ui
  - desktop#2587 Triple dot to ellipsis
  - desktop#2589 Misc fixes for Windows 7
  - desktop#2591 Remove last left over of the "remote" wording
  - desktop#2603 Get rid of FindQt5Keychain.cmake
  - desktop#2615 Fetch apps when we get connected only
  - desktop#2616 Move journaldb files back to sync folders
  - desktop#2620 Make sure the settings dialog exist before hiding it
  - desktop#2621 [documentation] upload chunks config
  - desktop#2630 Master is now 3.0.81
  - desktop#2647 Cherry pick updater fixes and improvements
  - desktop#2648 Issue a warning for Debian pipeline failures but don't fail the CI
  - desktop#2652 Handle the case when the release version differs from that in VERSION.cmake
  - desktop#2655 Use dynamic path for account online/offline state icon.
  - desktop#2658 Enable the QML debugger on debug builds
  - desktop#2660 FolderWatcher: fixes and improvements
  - desktop#2662 Fix QML debugging by removing incorrect dependency
  - desktop#2663 Fix Windows compilation broken after QML debugging fix.
  - desktop#2665 Sparkle build fixes
  - desktop#2666 Notification action buttons and context menu
  - desktop#2667 Master is now 3.0.82.
  - desktop#2675 Fix AppImage build
  - desktop#2677 Fix macOS bug where tray window causes spaces to switch
  - desktop#2682 Add debug log to check which folders are being skipped during syncing.
  - desktop#2685 Fixed slow sharee search in the share dialog
  - desktop#2686 Added sharing via email.
  - desktop#2690 Update documentation on how to generate debug logs.