data/ui: Make file comparison file-choosers support remote files

We should be able to now handle these, with our recent Gio porting.

Author: kaiw

data/ui/filediff.ui

@@ -349,6 +349,7 @@
                       <object class="GtkFileChooserButton" id="fileentry2">
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
+                        <property name="local-only">False</property>
                         <signal name="file-set" handler="on_fileentry_file_set" swapped="no"/>
                       </object>
                     </child>
@@ -419,6 +420,7 @@
                       <object class="GtkFileChooserButton" id="fileentry1">
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
+                        <property name="local-only">False</property>
                         <signal name="file-set" handler="on_fileentry_file_set" swapped="no"/>
                       </object>
                     </child>
@@ -489,6 +491,7 @@
                       <object class="GtkFileChooserButton" id="fileentry0">
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
+                        <property name="local-only">False</property>
                         <signal name="file-set" handler="on_fileentry_file_set" swapped="no"/>
                       </object>
                     </child>