Enabled paging on automount keys.

The automount keys search facet has been modified to support paging.
Since the automountkey-find command doesn't support --pkey-only
option, the facet is configured such that during a refresh operation
it will retrieve all entries (including the key and info attributes)
and then display only the ones that are supposed to be visible in
the current page.

Ticket #2093

install/ui/ipa.js

@@ -351,6 +351,10 @@ IPA.command = function(spec) {
         return that.options[name];
     };
 
+    that.remove_option = function(name) {
+        delete that.options[name];
+    };
+
     that.execute = function() {
 
         function dialog_open(xhr, text_status, error_thrown) {