make reloading UI scripts optional when doing Reload UI, and off by default

modules/initialize.py

@@ -109,7 +109,7 @@ def initialize_rest(*, reload_script_modules=False):
     with startup_timer.subcategory("load scripts"):
         scripts.load_scripts()
 
-    if reload_script_modules:
+    if reload_script_modules and shared.opts.enable_reloading_ui_scripts:
         for module in [module for name, module in sys.modules.items() if name.startswith("modules.ui")]:
             importlib.reload(module)
         startup_timer.record("reload script modules")

modules/shared_options.py

@@ -315,6 +315,8 @@ options_templates.update(options_section(('ui', "User interface", "ui"), {
     "show_progress_in_title": OptionInfo(True, "Show generation progress in window title."),
     "send_seed": OptionInfo(True, "Send seed when sending prompt or image to other interface"),
     "send_size": OptionInfo(True, "Send size when sending prompt or image to another interface"),
+    "enable_reloading_ui_scripts": OptionInfo(False, "Reload UI scripts when using Reload UI option").info("useful for developing: if you make changes to UI scripts code, it is applied when the UI is reloded."),
+
 }))