When Krusader users utilize the "Host" comboBox on the "New Network
Connection" dialog: they often see bad suggestions because there are obsolete
entries, mistakes and so on, but normal Krusader users can't remove those
entries. For example, web browsers have Shift+Del in order to remove the
thwarting entries.
With a KrHistoryComboBox, Krusader users are able to delete wrong entries
from history lists, and therefore they can remove those bad suggestions that
they were seeing.