BTPRO-210 Be more flexible when looking for the existing chapter heading
BK-946 Model Attachment and Cover are not deleting files on the disk
BK-947 Sortable widget in table of contents needs validation for the moves
BTPRO-239 Upon saving the chapter name does not get immediately modified in the left TOC panel
BK-949 Indent decrease plugin fails on Firefox
BK-937 Upgrade German translation files
BK-950 Add bootstrap popover library to the project
BK-948 Links should have a little popup with the URL.
BK-951 Remove code for selecting predefined style
BK-952 Create and destory tooltips as Chapter tab is shown and hidden
BK-954 Positioning cursor when the chapter is open is broken
BK-955 Implement router for client side pages
BK-956 Do not use Observer model to track changes in Table of contents
BK-957 Update Table Of Contents list in the Chapters tab when order is changed
BK-959 Switch to Backbone Models in Table Of Contents and Media tab
BTPRO-293 drag and drop image to from desktop to edit chapter leads to loss of chapters
BTPRO-279 FF, IE - > the URL stretches outside the boundaries of rectangular hyperlink tooltip
BK-960 User can open chapter editing screen by click on the chapter title in TOC
BK-961 Do not request backbone-min.map file
BK-962 Chapter is not updated correctly after chapter update