[toolbar] Adjust icon size along with text etc.
[toolbar] Adjust icon size along with text etc.

As discussed on the mailing list elm should scale the whole UI
based on the scale value. Make toolbar icons match this.

@fix

rvandegrift/elementary,tasn/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,rvandegrift/elementary