ISIS-537 Remove the panel-heading for EntityIconAndTitlePanel. It just makes the panel to take more space (vertical and horizontal)
ISIS-537 Replace the custom CSS class 'clear' with Bootstrap's 'clearfix'
ISIS-537 Simplify the animations for the sliding bookmarks menu. Using opacity didn't hide the layer and later it wasn't possible to use the nabvar (it was clicking on a bookmark)
ISIS-537 Use slide up/down effects to hide/show the bookmarks. Add 1px left margin to maek the bookmark ribbon more clear