Fixes Winforms Progressbar

[SahilNagpure07]

Fixes #2430

PR Checklist:

• All new features have been tested
• All new features have been documented
• I have read the CONTRIBUTING.md file
• I will abide by the code of conduct

[proneon267]

Just a heads up, #2430 is covered by #2484

[freakboy3742]

Thanks for the PR. It's currently failing CI because it's missing a changenote. It's also unclear if this will impact on tests - it feels like there should be an impact on tests.

[freakboy3742]

FYI - you can ignore the test failures on Python 3.13 - there's been a regression in Freezegun that is incompatible with Python 3.13.0a6; the fix has been made upstream, but we're waiting on an updated release.

However, the test failure on iOS does need to be resolved. You'll need to investigate why that test is failing and work around the issue, or find a way to make the test skip on iOS.

[freakboy3742]

A fix for the Python 3.13 issue can be found in #2498.