You can clone with
The Mac Toolbar window is normally used as Preferences. Currently there is only one window which basically embed an WebView. Would be good introduce another window type with toolbar supported.
The toolbar can be a special HTML element ( ), or a separate WebView which basically can render any valid HTML.
Well, I don't know its doable or not, nor the API design.
Why not use the normal webview for preferences? Most web apps have dedicated views, or modal dialogues, for preferences, why not do the same with your macgap app? What type of preferences are you referring to?
It's all about the look and feel. Just like all the work like JQuery mobile - it tried very hard to make the web application look like native iOS/Andorid app, MacGap should do the similar thing. FYI, the twitter preference window. Look at the toolbar on top. http://d.pr/xm25
Update: well I agree this isn't critical - user can always find creative way to do it.