do not modify the click command name when it is a MultiCommand #42 (#44)

* do not modify the click command name when it is a MultiCommand #42

* add patchable function for register_command

mara_app/app.py

@@ -66,8 +66,7 @@ def register_commands(self):
                 if 'callback' in command.__dict__ and command.__dict__['callback']:
                     package = command.__dict__['callback'].__module__.rpartition('.')[0]
                     if package != 'flask':
-                        command.name = package + '.' + command.name
-                        self.cli.add_command(command)
+                        register_command(self, command, package)
 
     def register_page_layout(self):
         """Adds a global layout with navigation etc. to pages"""
@@ -116,6 +115,22 @@ def patch_flask_url_for(self):
         flask.url_for = functools.lru_cache(maxsize=None)(original_url_for)
 
 
+def register_command(app: MaraApp, command: click.Command, package: str):
+    """
+    Register a new command to a mara flask app.
+
+    Args
+        app: the mara flask app
+        command: the command to be added
+        package: the python package name the command comes from
+    """
+    if isinstance(command, click.MultiCommand):
+        app.cli.add_command(command)
+    else:
+        command.name = package + '.' + command.name
+        app.cli.add_command(command)
+
+
 @functools.lru_cache(maxsize=None)
 def combine_navigation_entries() -> navigation.NavigationEntry:
     """Collects and merges all instances of NavigationEntry"""