fix(select): interimElement will resolve its promise even when transition end event is not fired

Occassionally the transitionEnd event will not fire and the '$mdUtil. waitTransitionEnd()' process will timeout; which
rejects the pending promise. Using '.finally()' allows the correct handlers to fire and will continuing to propagate the rejected
promise.

Fixes #3704. Fixes #3780. Fixes #3800. Closes #3794.

Author: Robert Messerle

src/core/services/interimElement/interimElement.js

@@ -412,7 +412,7 @@ function InterimElementProvider() {
           },
           remove: function() {
             self.cancelTimeout();
-            return removeDone = $q.when(showDone).then(function() {
+            return removeDone = $q.when(showDone).finally(function() {
               var ret = element ? options.onRemove(options.scope, element, options) : true;
 
               // Trigger onRemoving callback *before* the remove operation starts