Hi Joep,
you don't mention if you designed your site to be different in "mobile mode" or if you've just designed it to work on a small screen. In the WebHandler Properties you can set if the site should be "Desktop / Mobile / Detect" where Detect is the default setting.
So I'm guessing you might get what you want by forcing it here to be in Desktop mode (I know that sounds backwards, but it sounds like you've developerd it as a desktop app.)
regarding the click-to-dial, I guess you need to google the HTML that'll make that happen. I'm not aware of any way to dial the phone from html, but if you find something let me know.
cheers
Bruce