- Linting (ESLint): Remove now unneeded config and add per new update

- Refactoring: Prefer for-of, event.key (newly enforced linting)
- Refactoring: Better var. names
- npm: Update devDeps and update local copies

editor/svg-editor.js

@@ -2830,7 +2830,7 @@ editor.init = function () {
 
   const allHolders = {};
   /**
-   * @param {PlainObject.<string, module:SVGEditor.ToolButton>} holders Key is a selector
+   * @param {PlainObject<string, module:SVGEditor.ToolButton>} holders Key is a selector
    * @returns {void}
    */
   const setupFlyouts = function (holders) {