[FxCop] FancyZone Editor part 1 of many

[crutkas]

Summary of the Pull Request

Doing it gradually. I'm slowly upgrading stuff as this is a high traffic zone for the next few iterations. This is knocking out a few of violations

PR Checklist

• Applies to [Chore] Enable Static analysis (FxCopAnalyzers) on C# Projects #5129
• CLA signed. If not, go over here and sign the CLA
• Tests added/passed
• Requires documentation to be updated
• 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

Info on Pull Request

What does this include?

Validation Steps Performed

How does someone test & validate?

[enricogior]

@crutkas
this would generate too many conflicts with #6562

[crutkas]

Ok. I can close and redo this. Was trying to minimize the conflicts with small check ins.