title: Unity Editor positioning/snapping issue
body: <p>Basically, unity Editor started to "snap" X position of the transform by 1.
  When I drag any object on scene in editor (not in play mode) it slides smoothly along Y axes but dragging it along the X axis causes it to round the value to integer value.</p>
  
  <p>See the the attached GIF:
  <img src="https://i.stack.imgur.com/Su5lR.gif" alt="enter image description here"></p>
  
  <p>I do not hold Command or V buttons, I tried to play with Snap settings (actually, it looks like Snapping is broken at all, because holding Command or V doesn't seem to affect dragging in any way).
  If somebody knows, how to fix it in an existing project. I used to face this problem in earlier versions of Unity. Transferring assets to another project helped but this doesn't keep project settings like layers and tags and I'd like to avoid full reimport.</p>