Load a set of predefined labels (#3459)

* Can use a predefined set of labels

* Change UI

* Fix HTML file indentation

* Avoid reading file from other directory (security issue)

* Apply a better fix

* Remove not used variable

* Merge upstream/develop

* Do modifications

* Raname

* remove binding + rename variable

cmd/web.go

@@ -477,6 +477,7 @@ func runWeb(ctx *cli.Context) error {
 			m.Post("/new", bindIgnErr(auth.CreateLabelForm{}), repo.NewLabel)
 			m.Post("/edit", bindIgnErr(auth.CreateLabelForm{}), repo.UpdateLabel)
 			m.Post("/delete", repo.DeleteLabel)
+			m.Post("/initialize", bindIgnErr(auth.InitializeLabelsForm{}), repo.InitializeLabels)
 		}, repo.MustEnableIssues, reqRepoWriter, context.RepoRef())
 		m.Group("/milestones", func() {
 			m.Combo("/new").Get(repo.NewMilestone).