Improve translation of milestone filters (#26569)

https://github.com/go-gitea/gitea/issues/26567#issue-1855312074
> The terms `closest` and `furthest` don't describe the actual sorting
behavior as these two are semantically relative to the current date.
> Could we switch to `earliest` and `latest` instead?

close #26567

---------

Co-authored-by: yp05327 <576951401@qq.com>
Co-authored-by: Giteabot <teabot@gitea.io>

options/locale/locale_en-US.ini

@@ -1820,8 +1820,8 @@ milestones.edit_success = Milestone "%s" has been updated.
 milestones.deletion = Delete Milestone
 milestones.deletion_desc = Deleting a milestone removes it from all related issues. Continue?
 milestones.deletion_success = The milestone has been deleted.
-milestones.filter_sort.closest_due_date = Closest due date
-milestones.filter_sort.furthest_due_date = Furthest due date
+milestones.filter_sort.earliest_due_data = Earliest due date
+milestones.filter_sort.latest_due_date = Latest due date
 milestones.filter_sort.least_complete = Least complete
 milestones.filter_sort.most_complete = Most complete
 milestones.filter_sort.most_issues = Most issues

templates/repo/issue/milestones.tmpl

@@ -42,8 +42,8 @@
 					{{svg "octicon-triangle-down" 14 "dropdown icon"}}
 				</span>
 				<div class="menu">
-					<a class="{{if or (eq .SortType "closestduedate") (not .SortType)}}active {{end}}item" href="{{$.Link}}?sort=closestduedate&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.closest_due_date"}}</a>
-					<a class="{{if eq .SortType "furthestduedate"}}active {{end}}item" href="{{$.Link}}?sort=furthestduedate&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.furthest_due_date"}}</a>
+					<a class="{{if or (eq .SortType "closestduedate") (not .SortType)}}active {{end}}item" href="{{$.Link}}?sort=closestduedate&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.earliest_due_data"}}</a>
+					<a class="{{if eq .SortType "furthestduedate"}}active {{end}}item" href="{{$.Link}}?sort=furthestduedate&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.latest_due_date"}}</a>
 					<a class="{{if eq .SortType "leastcomplete"}}active {{end}}item" href="{{$.Link}}?sort=leastcomplete&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.least_complete"}}</a>
 					<a class="{{if eq .SortType "mostcomplete"}}active {{end}}item" href="{{$.Link}}?sort=mostcomplete&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.most_complete"}}</a>
 					<a class="{{if eq .SortType "mostissues"}}active {{end}}item" href="{{$.Link}}?sort=mostissues&state={{$.State}}&q={{$.Keyword}}">{{.locale.Tr "repo.milestones.filter_sort.most_issues"}}</a>