Update git submodules
- Update BlueSpiceBookshelf from branch 'master' to 4abcf0890af6f3d6b84679c5678820bcd5f0e0ff
- Add metadata action in book overview
ERM37392
[4.5.x]
Change-Id: Idf8b5796bf88ca9da95ed2aa5519d9dce35a5297 (cherry picked from commit efc705a22c52c84b51e48e9b6a4524209e150774)
- Add metadata action in book overview