Theme "Hide Title" should be "Hide Title Banner" and the entire title bar should be hidden

The "Hide Title" checkbox in Registry themes is currently doing just that: hiding only the title. This should be changed to "Hide Banner" (or similar language) to hide the entire banner with both title and Registry logo. (I believe this misbehavior came over in the transition from MDL to Bootstrap).

Note that any theme can hide this now by adding the following to the CSS field:

#banner {

  display: none;

}