BK-1262 Modify add book to group dialog
Merge 2.0 into BK-1262
BK-1263 Roles support inside of Booktype
Merge branch 'BK1262' into 2.0
BK-1271 History record is not saved when chapters are modified
BK-1268 Insert Figure button does not work in Firefox
BK-1291 Add Dutch translator to list of authors, thanks Bart!