Adds create branch split-dropdown button to the commit graph#3500

d13 merged 8 commits intomaingitkraken/vscode-gitlens:mainfrom

features/GLVSC-636_add-a-create-branch-split-button-to-the-graphgitkraken/vscode-gitlens:features/GLVSC-636_add-a-create-branch-split-button-to-the-graphCopy head branch name to clipboard