CatalogueUI : Improve tooltip slightly
CatalogueUI : Improve tooltip slightly

Users don't know what the ImageView class is, and they probably care more about the Viewer comparisons than they do the CatalogueSelect node.

johnhaddon/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,johnhaddon/gaffer