Fix a couple of issues with color scheme MVVM

[PankajBhojwani]

Summary of the Pull Request

• When 'discard changes' is hit, we re-initialize our list of color scheme view models but forgot to tell xaml about it, this commit fixes that.
• Make sure to exit rename mode when 'update settings' gets called

References

color schemes mvvm added in #13179

PR Checklist

• CLA signed. If not, go over here and sign the CLA
• I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Validation Steps Performed

Hitting discard changes doesn't cause an inconsistency with the currently selected scheme anymore

[zadjii-msft]

Sorry for busting spellbot, merging main should fix this

[zadjii-msft]

@msftbot merge this like yesterday

[ghost]

Hello @zadjii-msft!

I think you told me that you would like to reset custom auto-merge settings, but I am not confident that I have understood you correctly.

Please try rephrasing your instruction to me.

[zadjii-msft]

boo

@msftbot merge this in 1 minute

[ghost]

Hello @carlos-zamora!

Because this pull request has the AutoMerge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

Do note that I've been instructed to only help merge pull requests of this repository that have been opened for at least 8 hours, a condition that will be fulfilled in about 1 hour 15 minutes. No worries though, I will be back when the time is right! 😉

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