quick_frontend(profile manager): fixed alert messages

frontends/src/quick_frontend/quick_profile_manager.py

@@ -114,13 +114,13 @@ class QuickProfileManager(object):
                 self._autoconnect = False # manual mode
                 msg = _("Trying to plug an unknown profile key ({})".format(profile_key))
                 log.warning(msg)
-                self.alert(_("Profile plugging in error"), msg)
+                self.showDialog(_("Profile plugging in error"), msg, 'error')
                 break
             self.host.launchAction(C.AUTHENTICATE_PROFILE_ID, callback=authenticate_cb, profile=profile)
 
 
     def getParamError(self, dummy):
-        self.alert(_(u"Error"), _("Can't get profile parameter"))
+        self.host.showDialog(_(u"Error"), _("Can't get profile parameter"), 'error')
 
     ## Helping methods ##
 
@@ -153,12 +153,12 @@ class QuickProfileManager(object):
     def _onConnectProfiles(self):
         """Connect the profiles and start the main widget"""
         if self._autoconnect:
-            self.alert(_('Internal error'), _("You can't connect manually and automatically at the same time"))
+            self.host.showDialog(_('Internal error'), _("You can't connect manually and automatically at the same time"), 'error')
             return
         self.updateConnectionParams()
         profiles = self.getProfiles()
         if not profiles:
-            self.alert(_('No profile selected'), _('You need to create and select at least one profile before connecting'))
+            self.host.showDialog(_('No profile selected'), _('You need to create and select at least one profile before connecting'), 'error')
         else:
             # All profiles in the list are already validated, so we can plug them directly
             self.host.plug_profiles(profiles)
@@ -249,12 +249,4 @@ class QuickProfileManager(object):
 
     # dialogs
 
-    def alert(self, title, message):
-        """Show an alert message, must be implemented by frontends
-
-        @param title: title of the dialog/popup
-        @param message: error message
-        """
-        raise NotImplementedError
-
     # Note: a method which check profiles change must be implemented too