Move Qt 5 version to 5.15.3 open source.

Beta version 3.5.5: Fix build on macOS.

Beta version 3.5.4: Fix build with Xcode.

Beta version 3.5.3: Fix build with GCC.

Version 3.5.2.

- Fix a freeze in audio playback on Linux.
- Fix a crash in screen sharing initialization on Linux.

Version 3.5.1: Fix build with MSVC.

Version 3.5: Fix build with GCC.

Version 3.4.8.

- Nice animations in reactions.
- Add snap layouts support on Windows 11.
- Bug fixes and other minor improvements.

Beta version 3.4.7.

- Fix a crash on launch on Windows.

Beta version 3.4.6: Fix build with Xcode.