SideBySide2: Fix transfer of focus into comment box

Focus needs to be transferred after the browser event loop returns.
I don't recall specifically why this is necessary, but without the
defer the new comment box does not have focus.

Setting the cursor position immediately after transferring focus
appears to work, so these tasks can be combined together.

Change-Id: Ic28a1ba8d346779f20b4aef0bd794469377c3ddc
1 file changed