Fix display head and base in version dropdowns
What does this MR do?
Related to #209071 (closed) and #198457 (closed)
Displays "head" version in target dropdown list when the "head" version is selected
To see this locally you will need to enable the feature flag diff_compare_with_head
in bin/rails console
Feature.enable(:diff_compare_with_head)Screenshots
Does this MR meet the acceptance criteria?
Conformity
Edited by Justin Boyson