Shorten app description

README.rst

-AlekSIS (School Information System) — App App Store (Manage add-on apps from within AlekSIS)
-==================================================================================================
+AlekSIS (School Information System) — App Winkel (App Store)
+============================================================
 
 AlekSIS
 -------

aleksis/apps/winkel/apps.py

@@ -3,7 +3,7 @@ from aleksis.core.util.apps import AppConfig
 
 class DefaultConfig(AppConfig):
     name = "aleksis.apps.winkel"
-    verbose_name = "AlekSIS — App Store (Manage add-on apps from within AlekSIS)"
+    verbose_name = "AlekSIS — Winkel (App Store)"
 
     urls = {
         "Repository": "https://edugit.org/AlekSIS/onboarding//AlekSIS-App-Winkel",