add exception so that webapps with generic icon do not give errors

sailify_webapps.py

@@ -104,6 +104,11 @@ def main():
                 continue
             break
         app = apps[index]
+
+        if app["Icon"] == "icon-launcher-bookmark":
+            print("this webapp is using the generic icon of a bookmark and not a favicon so it is not possible to modify")
+            continue
+
         while True:
             pattern = input("Enter the pattern (0 = round, 1 = peak):\n>>> ")
             if len(pattern) != 4: