Hi,
Right now I'm testing CB 2.0.3 on a develop site which is a copy of a live site with CB 1.9 installed.
On 1.9 I am hiding the List selector, I cannot remember exactly how I did it but I suppose it was as described in this topic:
www.joomlapolis.com/forum/153-professional-member-support/222846-hiding-listdropdown-on-userlists?limitstart=0
In CB 2.0.3 in the back end there is an option to hide the selector: List > Parameters > Display > Show List Selector
This is a nice option, however I found that when using this parameter, some of the html is not adjusted accordingly. The selector is shown in a div with this class: cbColumn3 col-sm-3, while the other content of the header is in a div with the class: cbColumn9 col-sm-9. The class of the latter div remains the same when disabling the display of the selector, so the content is still being displayed in a div that uses only 75% of the available width. The same goes for the list itself.
Kind regards, Frits