make clicking extra networks button one more time close the extra networks UI

modules/ui_extra_networks.py

@@ -117,8 +117,13 @@ def create_ui(container, button, tabname):
     ui.button_save_preview = gr.Button('Save preview', elem_id=tabname+"_save_preview", visible=False)
     ui.preview_target_filename = gr.Textbox('Preview save filename', elem_id=tabname+"_preview_filename", visible=False)
 
-    button.click(fn=lambda: gr.update(visible=True), inputs=[], outputs=[container])
-    button_close.click(fn=lambda: gr.update(visible=False), inputs=[], outputs=[container])
+    def toggle_visibility(is_visible):
+        is_visible = not is_visible
+        return is_visible, gr.update(visible=is_visible)
+
+    state_visible = gr.State(value=False)
+    button.click(fn=toggle_visibility, inputs=[state_visible], outputs=[state_visible, container])
+    button_close.click(fn=toggle_visibility, inputs=[state_visible], outputs=[state_visible, container])
 
     def refresh():
         res = []