Add chatty and calls to favorites

Closes #35, #36

Signed-off-by: Guido Günther <guido.gunther@puri.sm>

data/sm.puri.phosh.gschema.xml

@@ -3,6 +3,8 @@
           path="/sm/puri/phosh/">
     <key name="favorites" type="as">
       <default>[ 'org.gnome.Contacts.desktop',
+                 'sm.puri.Calls.desktop',
+                 'sm.puri.Chatty.desktop',
                  'org.gnome.Calendar.desktop',
                  'evince.desktop',
                  'org.gnome.Epiphany.desktop',