Set CircleImageBase.imageObjAlt always when options change (#3053)

lib/network/modules/components/nodes/util/CircleImageBase.js

@@ -26,12 +26,12 @@ class CircleImageBase extends NodeBase {
   }
 
   setImages(imageObj, imageObjAlt) {
-    if (imageObj) {
-      this.imageObj = imageObj;
-
-      if (imageObjAlt) {
-        this.imageObjAlt = imageObjAlt;
-      }
+    if (imageObjAlt && this.selected) {
+      this.imageObj    = imageObjAlt;
+      this.imageObjAlt = imageObj;
+    } else {
+      this.imageObj    = imageObj;
+      this.imageObjAlt = imageObjAlt;
     }
   }