Disable focusing an object with orthographic camera that put the came…

…ra in an unrecoverable state (#757)

src/lib/EditorControls.js

@@ -54,6 +54,9 @@ THREE.EditorControls = function (_object, domElement) {
  var changeEvent = { type: 'change' };
 
  this.focus = function (target) {
+ if (this.isOrthographic) {
+ return;
+ }
  var distance;
 
  box.setFromObject(target);