Users with the appropriate permission can enable and disable apps for a particular project or area of the system.  To disable or enable an app:

1. Navigate to the appropriate project or area of the system
2. Navigate to the App Configuration app under the Admin menu
3. The Enable column will show all apps that are available.  Uncheck the checkbox to disable (hide) the app for the specific project or area that you are in.  Check the Enable checkbox to turn the app back on (shown below)

4. Click the Save button when complete