Improve confirm modal keydown listeners

www/common/common-interface.js

@@ -70,6 +70,7 @@ define([
                     if (typeof(yes) === 'function') { yes(e); }
                     break;
             }
+            $(el || window).off('keydown', handler);
         };
 
         $(el || window).keydown(handler);
@@ -587,7 +588,7 @@ define([
             $ok.click();
         }, function () {
             $cancel.click();
-        });
+        }, frame);
 
         document.body.appendChild(frame);
         setTimeout(function () {

www/common/drive-ui.js

@@ -3345,7 +3345,9 @@ define([
                 // in history mode we want to focus the version number input
                 if (!history.isHistoryMode && !APP.mobile()) {
                     var st = $tree.scrollTop() || 0;
-                    $tree.find('#cp-app-drive-tree-search-input').focus();
+                    if (!$('.alertify').length) {
+                        $tree.find('#cp-app-drive-tree-search-input').focus();
+                    }
                     $tree.scrollTop(st);
                 }
                 $tree.find('#cp-app-drive-tree-search-input')[0].selectionStart = getSearchCursor();