[4.4.3] Switch to Qt 6.2.9 (except on macOS)

[cbjeukendrup]

On macOS, it causes a problem with disappearing texts, which will take more time to fix. Also, the issues solved by this update affect other OSs more than macOS.

Resolves only on Windows: #23505
Resolves not yet: #23970
Resolves: #24232
Resolves: #24579
Resolves only on Windows: #24667

May solve some blank screen issues too (https://musescore.org/en/node/368527#comment-1257820)

[cbjeukendrup]

@DmitryArefiev This PR doesn't touch anything on macOS, so only Windows and Linux need to be tested.

[DmitryArefiev]

@cbjeukendrup Tested on Win10, LinuxUbuntu22.04
#23505 looks good
#24232 and #24579 - I can't check it properly because was not able to reproduce it before

For now, I found one UI regression: when moving cursor, the highlight disappears in the middle of item (File menu, Context menu):

bandicam.2024-09-17.18-24-00-369.mp4

[cbjeukendrup]

@DmitryArefiev That turned out to be another Qt bug, but fortunately I could apply a workaround that hopefully works and doesn't break anything else.

[DmitryArefiev]

@DmitryArefiev That turned out to be another Qt bug, but fortunately I could apply a workaround that hopefully works and doesn't break anything else.

@cbjeukendrup Yeah, that works well now. I will do a smoke test and get back with results tomorrow

[DmitryArefiev]

Tested on Win10, Mac13.6, LinuxUbuntu22.04.1 LTS
#23505 looks good
#24232 and #24579 - I can't check it properly because was not able to reproduce it before

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@cbjeukendrup
On Windows, I found a minor regression. On 125% scaling, there a white outline flickering when scrolling through expanded palettes.

bandicam.2024-09-26.14-23-32-037.mp4

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On Linux, there is much serious regression . Crash when open color picker in Properties (#24173) and crash when open file browser (when open Save dialog for new score or Save As dialog or Save As in Export dialog)

Screencast.from.2024-09-26.14-21-33.mp4

[MarcSabatella]

Is your Linux test using xcb or wayland? For me, the color picker doesn't work correctly on wayland in 4.4.2 anyhow - see my comment in #24173 (comment).

[DmitryArefiev]

Is your Linux test using xcb or wayland? For me, the color picker doesn't work correctly on wayland in 4.4.2 anyhow - see my comment in #24173 (comment).

@MarcSabatella I'm on LinuxUbuntu22.04.1 LTS with Wayland (GNOME Version 46)

And the color picker works fine in 4.4.2 and 4.4.3 builds

[cbjeukendrup]

See #24969; I created a new PR for Windows only, because it's convenient if the Linux artifacts still stay available.