Make new behavior overridable; update docs and examples

examples/wmts-ign.js

@@ -1,6 +1,5 @@
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
-import {defaults as defaultControls} from '../src/ol/control.js';
 import {getWidth} from '../src/ol/extent.js';
 import TileLayer from '../src/ol/layer/Tile.js';
 import {fromLonLat, get as getProjection} from '../src/ol/proj.js';
@@ -10,11 +9,6 @@ import WMTSTileGrid from '../src/ol/tilegrid/WMTS.js';
 
 const map = new Map({
   target: 'map',
-  controls: defaultControls({
-    attributionOptions: {
-      collapsible: false
-    }
-  }),
   view: new View({
     zoom: 5,
     center: fromLonLat([5, 45])