add a shortcut to user's profile page to admin user details (#27299)

templates/shared/user/profile_big_avatar.tmpl

@@ -13,7 +13,11 @@
 	</div>
 	<div class="content gt-word-break profile-avatar-name">
 		{{if .ContextUser.FullName}}<span class="header text center">{{.ContextUser.FullName}}</span>{{end}}
-		<span class="username text center">{{.ContextUser.Name}}</span>
+		<span class="username text center">{{.ContextUser.Name}} {{if .IsAdmin}}
+					<a class="muted" href="{{AppSubUrl}}/admin/users/{{.ContextUser.ID}}" data-tooltip-content="{{ctx.Locale.Tr "admin.users.details"}}">
+						{{svg "octicon-gear" 18}}
+					</a>
+				{{end}}</span>
 		<div class="gt-mt-3">
 			<a class="muted" href="{{.ContextUser.HomeLink}}?tab=followers">{{svg "octicon-person" 18 "gt-mr-2"}}{{.NumFollowers}} {{ctx.Locale.Tr "user.followers"}}</a> · <a class="muted" href="{{.ContextUser.HomeLink}}?tab=following">{{.NumFollowing}} {{ctx.Locale.Tr "user.following"}}</a>
 			{{if .EnableFeed}}