try to clean gpu memory each time the set_pipe is called with existing editor on device

app.py

@@ -63,6 +63,10 @@ with gr.Blocks(css="style.css") as demo:
         
         if image_editor is not None:
             image_editor = image_editor.to('cpu')
+            if device == 'cuda':
+                torch.cuda.empty_cache()
+                print("#### torch.cuda.memory_summary(device=None, abbreviated=False):")
+                print(torch.cuda.memory_summary(device=None, abbreviated=False))
 
         if input_image is None or not description_prompt:
             return None, "Please set all inputs."