updated default branch isn't shown in branch list until after restart

Description

If the default branch is changed on the GitHub or GitHub Enterprise server, this is refreshed in the local IndexedDB but not displayed until a restart.

Version

What version of GitHub Desktop are you running? This is displayed under the About GitHub Desktop menu item. If you are running from source, include the commit by running git rev-parse HEAD from your local repository.

GitHub Desktop version: 1.5.1

OS version: macOS Sierra 10.12.4

Steps to Reproduce

1. Create a new repository, make a commit, publish to GitHub
2. Create a new branch, named second-branch
3. Publish the branch to the server
4. Visit the repository’s branches settings page: https://github.com/{account}/{repository}/settings/branches
5. In the branch selector page, select the branch second-branch and press Update.
6. Switch back to the application and switch between repositories to force a refresh
7. Open the branch list

Expected behaviour: Default branch is listed as second-branch

Actual behaviour: Default branch is still master

Reproduces how often: it reproduces despite switching or performing a fetch until the app is restarted.

[Robjam]

Just ran into this, removing the repository and adding as an existing repository seems to update the default repository.

[taotien]

This still happens on 1.6.5. Default branch doesn’t update even with a restart of the app.