Add compare tag dropdown to releases page (#15695)

* Add compare tag dropdown to releases page

* Change defaults to be more intuitive and remove unneeded option

* Fix to select branch on releases page

Co-authored-by: Jonathan Tran <jon@allspice.io>
Co-authored-by: Kyle D <kdumontnu@gmail.com>

options/locale/locale_en-US.ini

@@ -855,6 +855,7 @@ branch = Branch
 tree = Tree
 clear_ref = `Clear current reference`
 filter_branch_and_tag = Filter branch or tag
+find_tag = Find tag
 branches = Branches
 tags = Tags
 issues = Issues
@@ -1913,6 +1914,7 @@ release.new_release = New Release
 release.draft = Draft
 release.prerelease = Pre-Release
 release.stable = Stable
+release.compare = Compare
 release.edit = edit
 release.ahead.commits = <strong>%d</strong> commits
 release.ahead.target = to %s since this release