Test branch prompt and issue title variable

[alexr00]

Refs: #1773

• anyOS @egamma
• anyOS @jrieken

Complexity: 2

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Use the nightly build of the extension to test with.

1. Set this setting "githubIssues.useBranchForIssues": "on",
2. Try the setting githubIssues.workingIssueBranch, and use the variable ${issueTitleNoSpaces} in the branch name.
3. Start working on an issue and verify that the issue branch matches what you set in step 2.
4. Set this setting "githubIssues.useBranchForIssues": "prompt".
5. Verify that when you start working an issue (not continue working, that remembers your branch) you are prompted to enter the name for your branch.