The Manage Apps page will allow you to manage all aspects of the web apps and websites added to the Accent app. The options available include:
Reorder Apps: Rearrange the ordering of apps as they are displayed on the App Bar.
Add Apps: Add a new app or site to the app bar.
Open App in Browser: Toggles opening the app within the Accent app or the default browser.
Delete App: Removes the app completely.
Show App Bar: Toggles the App Bar from hidden/displayed.
Show App Labels: Toggles the app labels off/on within the App Bar.
For more details on Web Apps please see this guide's dedicated section to that feature.