Changed class names on MyAccountNoteModal classes.
nodeBubble shouldn't be hidden.

It resides on kbMyAccountNoteModal that should be display:none until it is needed.
Bugfix: Corrected the mapping.
Refactored kb.overlay.

Now it takes a config object as only parameter.
I also added a noBgScroll option preventing the underlay to scroll if set to true.
Bugfix: Fixed syntax error in less/kb/my_account_layout.less
Hijacking EXLibris note system, and using our customized dialog.