- 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/browser.js

@@ -271,7 +271,7 @@ export const supportsNonScalingStroke = () => supportsNonScalingStroke_;
 export const supportsNativeTransformLists = () => supportsNativeSVGTransformLists_;
 
 /**
- * Set `supportsNativeSVGTransformLists_` to `false` (for unit testing)
+ * Set `supportsNativeSVGTransformLists_` to `false` (for unit testing).
  * @function module:browser.disableSupportsNativeTransformLists
  * @returns {undefined}
 */