Timeline: preventDefault() and stopPropagation during keyboard naviga…

…tion

  due to unwanted side effects, like marked text by cursor.

src/meteoJS/Timeline.js

@@ -775,14 +775,20 @@ export class Timeline {
               const matches = time.match(/^([0-9]+)\s*([a-zA-Z]+)$/);
               if (matches === null)
                 return;
-              if (_isEventMatchPressedKeys(event, this._keyboardNavigation[method][time]))
+              if (_isEventMatchPressedKeys(event, this._keyboardNavigation[method][time])) {
                 this[method](+matches[1], matches[2]);
+                event.preventDefault();
+                event.stopPropagation();
+              }
             });
           }
           else
             if (method in this &&
-                _isEventMatchPressedKeys(event, this._keyboardNavigation[method]))
+                _isEventMatchPressedKeys(event, this._keyboardNavigation[method])) {
               this[method]();
+              event.preventDefault();
+              event.stopPropagation();
+            }
         });
       });
   }