Home page preference URL input now selects all

 Bug: 3312287
 This changes it so that when the home page preference dialog pops up
 rather than the cursor being at the beggining of the URL all the
 text is selected. This matches the behavior of the URL input in the
 browser.

Change-Id: I71658f51bc7a8da1fa770d0beb9de281aefe9efa
1 file changed