[Enhancement] Tooltip for 'annotated' Tag should show creation Date and Tagger's Name + Email

[goran-w]

Annotated tags are objects by themselves, and thus contain the Date (of creation) and the Name + Email of the Tagger (i.e the Author).

For completeness, this info should be shown in the tooltip for a Tag (since there is no other place in SourceGit where this info can be found).

The following command shows how this info can be fetched:

git for-each-ref refs/tags --format="\
Tag name: %(refname:short)
Tag commit: %(objectname:short)
Tagger date: %(taggerdate)
Tagger name: %(taggername)
Tagger email: %(taggeremail)
Tagged commit: %(*objectname:short)
Tag message: %(contents)"

[goran-w]

Excellent, thanks!