Struts 2: do not try to provide PsiClass icon for irrelevant elements (IDEA-127623)
(cherry picked from commit 24daf76) CR-IU-778
Struts 2: do not try to provide PsiClass icon for irrelevant elements, take 2
align with ActionAnnotatorBase logic (IDEA-127623)
(cherry picked from commit ab1493e) CR-IU-778