Allows to set the properties of a title

Allows to add several files, and add the all in the current title, or each one in a new title

data/interface/wmain.ui~

@@ -908,6 +908,7 @@
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
                 <property name="use_stock">True</property>
+                <signal name="clicked" handler="on_wmain_window_delete_event" swapped="no"/>
               </object>
               <packing>
                 <property name="expand">False</property>