Enable text search on combo boxes

[carlos-zamora]

ComboBox has a text search function that allows users to type letters, and the ComboBoxItem starting with those letters is shown. In order to enable this functionality, the underlying items must be IStringable. This exposes a ToString() function and fixes all of our issues.

This PR adds the IStringable interface to ColorScheme, Profile, and EnumEntry.

References

#6800 - Settings UI Epic
#8768 - Keyboard Navigation
microsoft/microsoft-ui-xaml#4182 - discussion with WinUI about how to overcome this issue

Validation Steps Performed

Tested...

• Launch > Default Profile
• Color Schemes > Name
• Profile > Appearance > Color scheme
• Profile > Appearance > Font weight

Also tested radio buttons, but those still don't work, unfortunately. Looks like they don't have the same underlying mechanism.

[carlos-zamora]

Filed #9207 as a follow-up task. Settings model objects should not be IStringable. Instead, the view model should be.

[ghost]

Hello @DHowett!

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[zadjii-msft]

Okay I hate to block over just a trivial nit. So I won't block but I won't ✔️

[ghost]

🎉Windows Terminal Preview v1.7.572.0 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes
• Store Download

[JeffJefferson]

Is it possible to change the behaviour: "ComboBoxItem starting with those letters is shown" ? I want to type in only a part of the displayed value like the ending letters.

[zadjii-msft]

@JeffJefferson I don't believe that's possible with a stock ComboBox. We'd need to entirely roll a forked version to support fuzzy matching. Maybe a good request for https://github.com/microsoft/microsoft-ui-xaml? Though, I'm not sure that fuzzy matching like that is common on most combobox UX's in any UI framework. Like, on the web, I'm pretty sure the matching is exclusive to the start of the string.

(happy to be proven wrong)