adapt bar size to demo

Change-Id: Id746ce00f9e91397a3edf0b39bf7dbb08ea59885
block user input while we are in another user interaction

Change-Id: I25a846b0648d2d28585a58066a9bb1088d607c24
improve screen text positioning

Change-Id: Ia1f4ae40b8dbed2324c600f7ef68a33a5b04027b
remove unnecessary debug message

Change-Id: I63e65bce671d1feab4ea93bdff906b597ce180c3
react only to left mouse click

Change-Id: Ia4c2c52b8803cd36d7ed32be559ba446589377e7