BTPRO-178 add info about characters with spaces for the whole book
BK-923 Improve progress bar look in media screen
BK-924 Images with caption should be handled as Aloha Blocks
BK-925 After chapter has been saved content should have status unmodified
BK-926 IE9, IE10 -> Chapter re-entering from TOC -> Blank screen appears
BK-927 Select Tab on the left or right side will scroll view to the top of chapter
BK-928 Aloha editor does not work with IE11