Fix test execution in the release pipelines (microsoft#845)

Fix test execution in the release pipelines (microsoft#845)

Update up/down arrow keys' behavior for CommandBarFlyoutCommandBar (m…

…icrosoft#805)

* Fixing CommandBarFlyoutCommandBar's behavior of Up/Down keys:
- Down arrow from last primary command moves focus to More button (all releases)
- Down arrow from last secondary command moves focus to first primary command (on RS3+)
- Up arrow from first secondary command moves focus to More button (on RS3+)

* Removing dead code.

* Using Down/Up keys to move among primary commands logically, as opposed to physically.

Update parameter (microsoft#636)

Update MUXControls-Nuget-FrameworkPackage.props (microsoft#624)

Updating condition for adding reference to VCLibs.

Only add VCLibs for supported architectures microsoft#579 (microsoft#580

)

* Only add VCLibs for supported architectures microsoft#579

* Update build/NuSpecs/MUXControls-Nuget-FrameworkPackage.props

Co-Authored-By: dotMorten <1378165+dotMorten@users.noreply.github.com>

Merge release/2.1 to master (microsoft#533)

* Forward FlowDirection from TeachingTip to content (microsoft#515)

* Add script to automate repacking the nupkg with store signed appx files (microsoft#520)

* dont try to activate recycle pool which is not public. (microsoft#526)

* dont try to activate recycle pool which is not public.

* empty commit to kick the pipeline

* Ensure properties before they are used.

* Fix crash in uniform grid when fed an empty list (microsoft#529)

* Add updated intellisense file for 2.1 (microsoft#521)

Add updated intellisense file for 2.1 (microsoft#521)

Change release pipeline to use hosted agents for build (microsoft#445)

updated navviewitemheader and paneheader to use semibold text (micros…

…oft#316)