Include displacement and declutterMode in clone

src/ol/style/Icon.js

@@ -238,6 +238,8 @@ class Icon extends ImageStyle {
       scale: Array.isArray(scale) ? scale.slice() : scale,
       size: this.size_ !== null ? this.size_.slice() : undefined,
       src: this.getSrc(),
+      displacement: this.getDisplacement().slice(),
+      declutterMode: this.getDeclutterMode(),
     });
   }
 

test/browser/spec/ol/style/icon.test.js

@@ -67,6 +67,8 @@ describe('ol.style.Icon', function () {
         scale: 2,
         rotation: 4,
         size: [10, 12],
+        displacement: [5, 6],
+        declutterMode: 'obstacle',
       });
 
       const clone = original.clone();
@@ -87,6 +89,8 @@ describe('ol.style.Icon', function () {
       expect(original.getOpacity()).to.eql(clone.getOpacity());
       expect(original.getRotation()).to.eql(clone.getRotation());
       expect(original.getRotateWithView()).to.eql(clone.getRotateWithView());
+      expect(original.getDisplacement()).to.eql(clone.getDisplacement());
+      expect(original.getDeclutterMode()).to.eql(clone.getDeclutterMode());
     });
     it('copies all values with src', function () {
       const original = new Icon({