Stop the rightmost toolbar section wrapping

Remove the width directive for the rightmost toolbar section so that it
resizes to fit its contents and doesn't wrap when the toolbar is
resized. This effectively right-aligns the toolbar section.

Also, vertically align the rightmost and centre toolbar sections.

Bug: 61230
Change-Id: I91b599a01d0e2ca52515778aa9a63751dceddbc0
Merge "Stop the rightmost toolbar section wrapping"