Fixed uncheck all button at main components page

ubinstall-gtk.glade

@@ -2138,6 +2138,7 @@ Select a different installation sources.</property>
                             <child>
                               <object class="GtkCheckButton" id="OSSoftwareUncheckAllCheck">
                                 <property name="label" translatable="yes">Uncheck all</property>
+                                <property name="visible">True</property>
                                 <property name="can-focus">True</property>
                                 <property name="receives-default">False</property>
                                 <property name="draw-indicator">True</property>