创建issue可以指定并修改相关分支

templates/repo/issue/branch_selector_field.tmpl

@@ -1,6 +1,6 @@
 {{if and (not .Issue.IsPull) (not .PageIsComparePull)}}
 <input id="ref_selector" name="ref" type="hidden" value="{{.Issue.Ref}}">
-<div class="ui {{if .ReadOnly}}disabled{{end}} floating filter select-branch dropdown" data-no-results="{{.i18n.Tr "repo.pulls.no_results"}}">
+<div class="ui floating filter select-branch dropdown" data-no-results="{{.i18n.Tr "repo.pulls.no_results"}}">
 	<div class="ui basic small button">
 		<span class="text branch-name">{{if .Issue.Ref}}{{$.RefEndName}}{{else}}{{.i18n.Tr "repo.issues.no_ref"}}{{end}}</span>
 		<i class="dropdown icon"></i>