fix button style

data/resources/ui/image-page.ui

@@ -58,7 +58,8 @@
             <property name="visible">false</property>
             <property name="halign">center</property>
             <style>
-              <class name="suggested-action, pill" />
+              <class name="suggested-action" />
+              <class name="pill" />
             </style>
             <child>
               <object class="GtkBox">