Fix and enhance comment editor monospace toggle (#36181)

Fixes: https://github.com/go-gitea/gitea/issues/36175

1. Correctly apply setting on textareas spawned by comment edit
3. When changing the setting, apply it to all textareas on the current page

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/globals.d.ts

@@ -77,6 +77,7 @@ interface Window {
     push: (e: ErrorEvent & PromiseRejectionEvent) => void | number,
   },
   codeEditors: any[], // export editor for customization
+  localUserSettings: typeof import('./modules/user-settings.ts').localUserSettings,
 
   // various captcha plugins
   grecaptcha: any,