It is currently not possible to display more than 25 applications using the FloatingPanel or the Remote Taskbar.
However, you can display more than 25 assigned applications using the RemoteApp display with the Application Panel.
- assign the Application Panel to the user,
- customize its display using Edit application available in the AdminTool:
- Application > Publish,
- setting the "Number of application displayed (per line)" to 5 or more.