fix saving configuration

integration with setup-multiseat-pulse
add sound cards to device list
attach frame buffer
improve device management

change pop-up message (closes: #40205)
update translation

refactoring get_device_name function (closes: #40097)
add the ability to save and restore the config
remove device_flush call from cache_seat_rm_all and cache_seat_remove (closes: #40098)
mark a seat when it is active

fix list-seats (closes: #39917, #39964)
reboot when activate
show drm/card0
small fixes
change message for pop-up dialog

disable saving configuration
hide /drm/card0
fix popup message (closes: #39916)
fix help

disable test activation (closes: #39911)
add multiple selection in the device list (closes: #39915)
show a message box when activated (closes: #39916)
flush-devices when remove seat (closes: #39913)
rename buttons (closes: #39918, #39912)
update help (closes: #39910, #39914)

init