Beta version 3.7.5: Fix MSVC x64 Release build.

Beta version 3.7.4: Update tg_owt in snap.

Version 3.7.3: Don't copy text from a restricted post.

Version 3.7.2.

- Fix mute period selector values.
- Fix a crash in repeated context menu item selection.
- Fix context menu item selection of systems without a compositor.

Version 3.7.1.

- Hardware accelerated video decoding off by default.
- Fix several crashes.

Version 3.7: Fix a crash in some langpacks.

Beta version 3.6.3: Don't build OBJC precompiled header.

Version 3.6.1: Fix video-from-webpage-preview download.

Version 3.6: Fix build with GCC.

Move Qt 5 version to 5.15.3 open source.