Adding Region & Language page to the system panel. https://gitlab.gnome.org/Teams/Design/settings-mockups/-/blob/master/system/system-panel.png See #2241
- remove references to deprecated app symbolics - reduce file size of private-use icons - update dated icons
This matches the new designs in https://gitlab.gnome.org/Teams/Design/settings-mockups/blob/master/region-and-language/region-and-language.png