GUI Status in Fullscreen Display

In the full screen display of ALV with IDA, no functions are providd in the toolbar of the GUI status.

However, you can use pushbuttons and functions of your own by setting a corresponding GUI status.

Interface	Method
`IF_SALV_GUI_FULLSCREEN_IDA`	`set_pf_status`

Report example: SALV_IDA_DISPLAY_FULLSCREEN