Added check for disabled Packages (#21540) (#21614)

Backport #21540

At the moment, If admin disable Packages, still show the Packages on the
admin dashboard.

This patch added a check to hide the Packages entry.

Author: Xinyu Zhou

Diff for: routers/web/web.go

@@ -566,6 +566,8 @@ func RegisterRoutes(m *web.Route) {
 			m.Post("/delete", admin.DeleteNotices)
 			m.Post("/empty", admin.EmptyNotices)
 		})
+	}, func(ctx *context.Context) {
+		ctx.Data["EnablePackages"] = setting.Packages.Enabled
 	}, adminReq)
 	// ***** END: Admin *****
 

Diff for: templates/admin/navbar.tmpl

@@ -12,9 +12,11 @@
 		<a class="{{if .PageIsAdminRepositories}}active{{end}} item" href="{{AppSubUrl}}/admin/repos">
 			{{.i18n.Tr "admin.repositories"}}
 		</a>
-		<a class="{{if .PageIsAdminPackages}}active{{end}} item" href="{{AppSubUrl}}/admin/packages">
-			{{.i18n.Tr "packages.title"}}
-		</a>
+		{{if .EnablePackages}}
+			<a class="{{if .PageIsAdminPackages}}active{{end}} item" href="{{AppSubUrl}}/admin/packages">
+				{{.i18n.Tr "packages.title"}}
+			</a>
+		{{end}}
 		{{if not DisableWebhooks}}
 			<a class="{{if or .PageIsAdminDefaultHooks .PageIsAdminSystemHooks}}active{{end}} item" href="{{AppSubUrl}}/admin/hooks">
 				{{.i18n.Tr "admin.hooks"}}