Devhelp 3.10 Beta 1 Was Ported to GtkHeaderBar, GtkSearchBar, and More

The good news about this first Beta release of Devhelp 3.10 is that it was ported to GtkSearchBar, GtkHeaderBar, etc., thanks to Ignacio Casal Quinteiro. Moreover, an error regarding gsetting schema when gsettings-data-convert starts was fixed in Devhelp 3.10 Beta 1.