Rename milestone helper tooltip methods to help distinguish them
Description
Currently the helper methods for the milestone tooltips (app/helpers/milestones_helper.rb) are a bit messy, with methods such as milestone_tooltip_title even though there are multiple tooltips.
With the recent implementation of additional tooltips, this makes even less sense.
Proposal
Review all tooltip-related methods in milestones_helper.rb and better name them to distinguish them.
May also be worth checking other tooltip helpers and creating separate issues for them.
Links / references
Edited by 🤖 GitLab Bot 🤖