build: Fix deprecation warning on xfce_titled_dialog_create_action_area
And bump some version requirements and remove some #ifdefs by the way.
I've set libxfce4ui version to 4.16.0, to stick with ubuntu 22.04, even if more is required in many other components... I'm not sure we want to set 4.19.3 here though (this #ifdef
to avoid the deprecation warning is used in other components, including thunar and the panel).