am ccbb7447: Merge "Grey out merge button after it is clicked." into lmp-mr1-dev

* commit 'ccbb7447ec8d4c3895f365d6c33d3ab950a20e49':
  Grey out merge button after it is clicked.
tree: b8dcc32f9709e977498f80f0ac785ad6491a1bac
  1. InCallUI/