commit multiple files from externals

[mshoestrng]

At present, I can select multiple files in source control, right-click them and choose "commit selected". However, when some of the files are in externals, source control in vscode will show them in different panels, and I can only commit files from the same panel. Thus, if I have changed files in trunk and also some files in some externals, I have to commit them separately.

It would be convenient if I can commit all the files in one step like I can do with TortoiseSVN.

(copy from https://github.com/microsoft/vscode/issues/83869)

Probably related to #622