title: XCode 6 won't let me put autolayout constraints on UIView. What am I doing wrong?
body: <p>1) I am using XCode 6 and  add a UIViewController to my storyboard.</p>
  
  <p>2) I add an UITableView and another UIView "Footer" to the UIViewController's View.</p>
  
  <p>3) Now I want to set some autolayout constraints on the UITableView  make the Footer always stay at the bottom of the TableView  (but above the bottom Toolbar)</p>
  
  <p>4) I hit the  XCode "Align" Icon to set some constraints.</p>
  
  <p>Unfortunately all interesting constraints like "Bottom Edges" etc are disabled.
  What am I doing wrong?</p>