quick frontend (widget): minor profiles check on widget creation

frontends/src/quick_frontend/quick_widgets.py

@@ -275,10 +275,10 @@ class QuickWidget(object):
             if not self.PROFILES_ALLOW_NONE:
                 raise ValueError("profiles can't have a value of None")
         else:
-            if not self.PROFILES_MULTIPLE and len(profiles) != 1:
-                raise ValueError("multiple profiles are not allowed")
             for profile in profiles:
                 self.addProfile(profile)
+            if not self.profiles:
+                raise ValueError("no profile found, use None for no profile classes")
 
     @property
     def profile(self):