Improve picture transfer UI

Replace texts like "initializing transfer" with nice animations

changed milestone to %Iteration 22

added enhancement label

changed milestone to %Iteration 23

changed milestone to %Iteration 24

changed milestone to %Iteration 25

added SprintIn progress label

changed milestone to %Iteration 26

added SprintTo review label and removed SprintIn progress label

changed milestone to %Iteration 27

unassigned @anaghshzan

design? Still the case?

removed SprintTo review label

closed