- 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/canvg/rgbcolor.js

@@ -189,7 +189,7 @@ const colorDefs = [
 ];
 
 /**
- * A class to parse color values
+ * A class to parse color values.
  */
 export default class RGBColor {
   /**
@@ -253,7 +253,7 @@ export default class RGBColor {
   }
 
   /**
-  * help
+  * Offers a bulleted list of help.
   * @returns {HTMLUListElement}
   */
   getHelpXML () {
@@ -275,8 +275,8 @@ export default class RGBColor {
         const listItem = document.createElement('li');
         const listColor = new RGBColor(examples[i]);
         const exampleDiv = document.createElement('div');
-        exampleDiv.style.cssText =
-`margin: 3px;
+        exampleDiv.style.cssText = `
+margin: 3px;
 border: 1px solid black;
 background: ${listColor.toHex()};
 color: ${listColor.toHex()};`