title: grey strikes strokes through folders in eclipse
body: <p>I've been working with this project for some time.
  Today grey strikes appeared through the folders of one project (PhoneStreamingActivity).
  Why?
  I was wiring up the jni component of my project and moving some files between packages when it happened.</p>
  
  <p><img src="https://i.stack.imgur.com/jHWzD.png" alt="enter image description here"></p>