Fix issue filter (#34914)

`0` is zero value and won't be put into query parameter by QueryBuild

Fix #34913

Author: wxiaoguang

templates/repo/issue/filter_item_label.tmpl

@@ -22,7 +22,7 @@
 		<span class="label-filter-exclude-info">{{ctx.Locale.Tr "repo.issues.filter_label_exclude"}}</span>
 		<div class="divider"></div>
 		<a class="item label-filter-query-default" href="{{QueryBuild $queryLink "labels" NIL}}">{{ctx.Locale.Tr "repo.issues.filter_label_no_select"}}</a>
-		<a class="item label-filter-query-not-set" href="{{QueryBuild $queryLink "labels" 0}}">{{ctx.Locale.Tr "repo.issues.filter_label_select_no_label"}}</a>
+		<a class="item label-filter-query-not-set" href="{{QueryBuild $queryLink "labels" "0"}}">{{ctx.Locale.Tr "repo.issues.filter_label_select_no_label"}}</a>
 		{{/* The logic here is not the same as the label selector in the issue sidebar.
 		The one in the issue sidebar renders "repo labels | divider | org labels".
 		Maybe the logic should be updated to be consistent.*/}}

templates/repo/issue/filter_list.tmpl

@@ -15,7 +15,7 @@
 			<input type="text" placeholder="{{ctx.Locale.Tr "repo.issues.filter_milestone"}}">
 		</div>
 		<div class="divider"></div>
-		<a class="{{if not $.MilestoneID}}active selected {{end}}item" href="{{QueryBuild $queryLink "milestone" 0}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_all"}}</a>
+		<a class="{{if not $.MilestoneID}}active selected {{end}}item" href="{{QueryBuild $queryLink "milestone" NIL}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_all"}}</a>
 		<a class="{{if $.MilestoneID}}{{if eq $.MilestoneID -1}}active selected {{end}}{{end}}item" href="{{QueryBuild $queryLink "milestone" -1}}">{{ctx.Locale.Tr "repo.issues.filter_milestone_none"}}</a>
 		{{if .OpenMilestones}}
 			<div class="divider"></div>