fix multiple-label filter on milestone issuelist

Author: noerw

templates/repo/issue/milestone_issues.tmpl

@@ -54,7 +54,7 @@
 							<span class="info">{{.i18n.Tr "repo.issues.filter_label_exclude" | Safe}}</span>
 							<a class="item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&assignee={{$.AssigneeID}}">{{.i18n.Tr "repo.issues.filter_label_no_select"}}</a>
 							{{range .Labels}}
-								<a class="item label-filter-item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.ID}}&assignee={{$.AssigneeID}}" data-label-id="{{.ID}}">{{if .IsExcluded}}{{svg "octicon-circle-slash"}}{{else if contain $.SelLabelIDs .ID}}{{svg "octicon-check"}}{{end}}<span class="label color" style="background-color: {{.Color}}"></span> {{.Name | RenderEmoji}}</a>
+								<a class="item label-filter-item" href="{{$.Link}}?q={{$.Keyword}}&type={{$.ViewType}}&sort={{$.SortType}}&state={{$.State}}&labels={{.QueryString}}&assignee={{$.AssigneeID}}" data-label-id="{{.ID}}">{{if .IsExcluded}}{{svg "octicon-circle-slash"}}{{else if contain $.SelLabelIDs .ID}}{{svg "octicon-check"}}{{end}}<span class="label color" style="background-color: {{.Color}}"></span> {{.Name | RenderEmoji}}</a>
 							{{end}}
 						</div>
 					</div>