Git-flow version tag prefix for submodules not initialized

[Noah Oblath]

I've noticed that when dealing with a git submodule, when I initialize the git-flow extension of Sourcetree, the version tag I specify does not get put in the git config file.

To replicate:

1. Create a repository with a submodule, and add it to Sourcetree
2. Open the Sourcetree window for the submodule
3. Initialize the git-flow extension and specify a version tag prefix
4. Check in .git/modules/[submodule]/config, under [gitflow "prefix"], the versiontag will be blank.

Workaround: I can manually edit the config file and reopen the Sourcetree window for the submodule, and the prefix I want will be in use.