Support CompiledBlock in error reports. Merges forgotten fix from Etoys 5 to make StandardViewer >> #addHeaderMorphWithBarHeight:includeDismissButton: work again, in case you got costumes.
=============== Diff against EToys-mt.422 ===============
Item was changed:
----- Method: AlignmentMorph>>addUpDownArrowsFor: (in category '*Etoys-initialization') -----
"Add a column of up and down arrows that serve to send upArrowHit and downArrowHit to aMorph when they're pressed/held down"