Adds title on branch commit counts

[ajmeese7]

Adds a title to the commit counts when comparing branches, making it easier for novice users to understand what the numbers mean.

Fixes #34867.

[lunny]

It needs to be translationable.

[silverwind]

Use data-tooltip-content instead.

[delvh]

Also, wouldn't it make sense to unify both titles into a single title on the parent element?
So it would compare both behind and ahead in the same title.

[wxiaoguang]

Also, wouldn't it make sense to unify both titles into a single title on the parent element? So it would compare both behind and ahead in the same title.

My thought is that why duplicate the numbers in the tooltip .... could it simply just show a fixed tool tip like "Commits ahead", and let users read the rendered number on the UI?

[ajmeese7]

Also, wouldn't it make sense to unify both titles into a single title on the parent element? So it would compare both behind and ahead in the same title.

My thought is that why duplicate the numbers in the tooltip .... could it simply just show a fixed tool tip like "Commits ahead", and let users read the rendered number on the UI?

That is what GitLab does, that is the behavior I am emulating

[ajmeese7]

Also, wouldn't it make sense to unify both titles into a single title on the parent element? So it would compare both behind and ahead in the same title.

Working on this now.