- Refactoring: Avoid unnecessary addEventListener false; change internal

jPicker function to class (used with `new`)
- Linting (ESLint): Add `valid-jsdoc` rule and make fixes; but turn off for
  now due to <https://github.com/eslint/eslint/issues/11036> and
  <https://github.com/eslint/eslint/issues/11037>
- Docs (JSDoc): Add some Markdown for variables, line breaks; tighten checks
  for overly generic types (though allow for `.Function` as in
  `jQuery.Function`) and avoid one previously missed instance

editor/svgtransformlist.js

@@ -337,7 +337,7 @@ export let removeElementFromListMap = function (elem) {
 };
 
 /**
-* Returns an object that behaves like a `SVGTransformList` for the given DOM element
+* Returns an object that behaves like a `SVGTransformList` for the given DOM element.
 * @function module:SVGTransformList.getTransformList
 * @param {Element} elem - DOM element to get a transformlist from
 * @todo The polyfill should have `SVGAnimatedTransformList` and this should use it
@@ -372,7 +372,7 @@ export const getTransformList = function (elem) {
 * @param {Element} elem
 */
 /**
-* For unit-testing
+* Replace `removeElementFromListMap` for unit-testing.
 * @function module:SVGTransformList.changeRemoveElementFromListMap
 * @param {module:SVGTransformList.removeElementFromListMap} cb Passed a single argument `elem`
 * @returns {undefined}