Residual linting

{object} -> {Object}
Remove extra semicolons.
Use jQuery’s .empty().
Make nodelist loops O(n) rather than O(n^2).
Specify radix in parseInt to prevent guessing octal.

editor/history.js

@@ -33,7 +33,7 @@ svgedit.history.HistoryEventTypes = {
 /**
  * An interface that all command objects must implement.
  * @typedef svgedit.history.HistoryCommand
- * @type {object}
+ * @type {Object}
  *   void apply(svgedit.history.HistoryEventHandler);
  *   void unapply(svgedit.history.HistoryEventHandler);
  *   Element[] elements();