Add permission check to menu point

CHANGELOG.rst

@@ -14,6 +14,7 @@ Fixed
 ~~~~~
 
 * The Matrix groups and rooms threw a 404 error.
+* The Matrix parent menu point was displayed even though the user had no permission to see it.
 
 `2.0b0` - 2023-02-23
 --------------------

aleksis/apps/matrix/frontend/index.js

@@ -3,6 +3,7 @@ export default {
     inMenu: true,
     titleKey: "matrix.menu_title",
     icon: "mdi-forum-outline",
+    permission: "matrix.view_matrixrooms_rule",
   },
   props: {
     byTheGreatnessOfTheAlmightyAleksolotlISwearIAmWorthyOfUsingTheLegacyBaseTemplate: true,