Add Dark Mode support for Windows

[AufarZakiev]

Fixes #5274

Description of the Change

1. Bumps WxWidgets version to be higher than 3.3
2. Forces common elements to use OS theme
3. Retrieves dark theme flag and carefully repaints

• Charts (Statistics, Disk panels)
• Progress bars (to make progress values easily visible)
• Notices list

Note: wxWidgets' IsDark() returns false on Win 11 now even if dark mode is enabled. Therefore, registry reading mechanism was introduced as an additional check

Tested on Win 11.

Alternate Designs

• Should we force version bump? If WxWidgets is outdated, the code still works in always-light mode. Vcpkg complains about this version constraint too

Screenshots:

Release Notes
Add Dark Mode support for Windows

[AufarZakiev]

Nice PR number for such a change, btw

[AenBleidd]

@AufarZakiev,

Note: wxWidgets' IsDark() returns false on Win 11 now even if dark mode is enabled. Therefore, registry reading mechanism was introduced as an additional check

For Windows use IsSystemDark() function instead:
https://docs.wxwidgets.org/latest/classwx_system_appearance.html#ac6c70858bb3e4c35a0b1af42997b6c42

[AufarZakiev]

AreAppsDark() fits better, doesn't it?
At least, apps on my desktop react on this value and ignore IsSystemDark()

[AenBleidd]

AreAppsDark() fits better, doesn't it?

Yes, it looks like this is really better. Good catch!

[AenBleidd]

Are you sure this is needed? I do remember when I tested the dark mode, I didn't have this enabled

[AufarZakiev]

Did it according to docs. Yes, without it just ignores OS settings

[CharlieFenton]

@AufarZakiev @AenBleidd Please make absolutely sure that all your changes are guarded by #ifdef _WIN32 to prevent creating problems for Mac and Linux.

[CharlieFenton]

@AufarZakiev @AenBleidd Please make absolutely sure that all your changes are guarded by #ifdef _WIN32 to prevent creating problems for Mac and Linux.

or #ifdef __WXMSW__

[AenBleidd]

@CharlieFenton, of course we will, no worries. This is too far from being finished, and it's too early to talk about this now, but this is definitely something I will keep in mind while doing a review of the code.