title: increase UIProgressView height when using it as titleView in navigation bar
body: <p>I'm using a progress view (UIProgressView) as the <code>titleView</code> in a navigation item, so that it appears in my navigation bar. No matter what I do, it appears very narrow in iOS 7.1:</p>
  
  <p><img src="https://i.stack.imgur.com/KZDfE.png" alt="enter image description here"></p>
  
  <p>I hate this version of the progress view. How can make it fatter / thicker / taller? I've tried everything suggested <a href="https://stackoverflow.com/questions/22645533/height-of-programmatically-created-uiprogressview-is-ignored-in-ios-7-1-always">here</a> and <a href="https://stackoverflow.com/questions/3437564/how-to-increase-height-of-uiprogressview">here</a>. I've tried changing the frame, adding a transform, using a custom subclass, adding constraints (these just cause a crash). And the trick I used to use, adding a <code>progressImage</code> and <code>trackImage</code>, is <a href="https://stackoverflow.com/questions/22311516/uiprogressview-custom-track-and-progress-images-in-ios-7-1">broken in iOS 7.1</a>!</p>
  
  <p>Here's my code (the whole thing is happening in code; I have no nibs or storyboards in this project):</p>
  
  <pre><code>UIProgressView* prog = [[UIProgressView alloc] init];
  self.prog = prog;
  self.prog.progressTintColor = [UIColor colorWithRed:1.000 green:0.869 blue:0.275 alpha:1.000];
  self.prog.trackTintColor = [UIColor darkGrayColor];
  self.navigationItem.titleView = prog;
  </code></pre>