addhw: Some UI cleanup and simplification

src/virtManager/addhardware.py

@@ -705,6 +705,9 @@ class vmmAddHardware(gobject.GObject):
         self.window.get_widget("create-forward").show()
 
     def page_changed(self, notebook, page, page_number):
+        devbox = self.window.get_widget("host-device")
+        devbox.hide()
+
         if page_number == PAGE_CHAR:
             devtype = self.window.get_widget("char-device-type")
             self.change_char_device_type(devtype)
@@ -713,6 +716,9 @@ class vmmAddHardware(gobject.GObject):
         elif page_number == PAGE_SUMMARY:
             self.populate_summary()
 
+        elif page_number == PAGE_HOSTDEV:
+            devbox.show()
+
         return
 
     def populate_summary(self):