Settings: Add setting for hiding version number for anonymous users (#24919)

* Settings: Add setting for hiding version number for anonymous users

Fixes #12925

* Hide version string from footer when unavailable

* Settings: Test frontend settings with hide version for anonymous users

* Settings: Add hide version variable to frontend settings

* Make AnonymousHideVersion non-global

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

* Settings: Improve test neighbor friendliness, reset state before and after

* Settings: Use T.Cleanup

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/api/index.go

@@ -360,9 +360,14 @@ func (hs *HTTPServer) setIndexViewData(c *models.ReqContext) (*dtos.IndexViewDat
 		})
 	}
 
+	helpVersion := fmt.Sprintf(`%s v%s (%s)`, setting.ApplicationName, setting.BuildVersion, setting.BuildCommit)
+	if hs.Cfg.AnonymousHideVersion && !c.IsSignedIn {
+		helpVersion = setting.ApplicationName
+	}
+
 	data.NavTree = append(data.NavTree, &dtos.NavLink{
 		Text:         "Help",
-		SubTitle:     fmt.Sprintf(`%s v%s (%s)`, setting.ApplicationName, setting.BuildVersion, setting.BuildCommit),
+		SubTitle:     helpVersion,
 		Id:           "help",
 		Url:          "#",
 		Icon:         "question-circle",