Merge pull request github#2549 from github/fixes/2547-pr-preview-broken

Update Octokit.GraphQL schema

Merge pull request github#2512 from davidwengier/FixDiffCaptions

Prevent error when filenames have braces in them

Merge pull request github#2460 from github/azure-pipelines/certificat…

…e-sha1

Sign the VSIX

Merge pull request github#2482 from github/fixes/2481-PullRequest.tim…

…elineItems

Use PullRequest.timelineItems instead of PullRequest.timeline

Merge pull request github#2462 from github/fixes/2455-request-workflo…

…w-scope

Request the `workflow` scope

Add design time resources for font scaling

Add scaling styles for built in Labels and TextBlocks on Visual Studio 2015 and up.

Merge pull request github#2156 from github/autocompletebox

Migrating and Updating AutoCompleteBox from *original* GitHub Desktop for Windows

Properly bumping to 2.8.1

Merge pull request github#1968 from github/l10n_master

New Crowdin translations

Merge fde4693 into 337f266