title: ios 7 tel: links not working when web app opened from home screen
body: <p>I have a functional web app running on iOS 6, where I use the url scheme tel: at several places. Since I installed the beta 6 Version of iOS 7, these links don't seem to work anymore. But only when the web app is running in this kind of "sandbox" mode, when opened from the home screen. When it is opened in safari directly, the links work as expected.</p>
  
  <p>I tried a normal http link to be sure that there is not a general problem related to links. But no, this works properly in both modes.</p>
  
  <p>Does anyone have an idea or experienced the same? Is this some kind of "security feature"?</p>
  
  <p>Thank you.</p>