When you click any apps from menu or from launcher panel, the mouse cursor does not turn into processing state indicating that the app is opening. Indication of a mouse cursor that is process will inform the user that the app was clicked correctly and the app is in the process to be opened.
While you click/double click app from the desktop, the mouse process indication will be displayed. The mouse process indication is the one the has a circle rotating beside the mouse cursor.
There should be the same behavior when you open apps at the desktop, menu, launcher or anywhere or on any window on the desktop to launch app or any activity to indicate that process is going on