fix: set the initial value of the config values

Author: aminya

lib/mixins/canvas-drawer.js

@@ -18,13 +18,14 @@ let thisSpec
  * methods  are available on any `MinimapElement` instance.
  */
 export default class CanvasDrawer {
-  constructor() {
+  constructor () {
     // set in setModel of minimapElement
     this.minimap = undefined
     // set by minimapElement
-    this.displayCodeHighlights = undefined
-    this.ignoreWhitespacesInTokens = undefined
+    this.displayCodeHighlights = atom.config.get('minimap.displayCodeHighlights')
+    this.ignoreWhitespacesInTokens = atom.config.get('minimap.ignoreWhitespacesInTokens')
   }
+
   /**
    * Initializes the canvas elements needed to perform the `Minimap` rendering.
    */