removed presumably obsolete workaround (see 7924d61b50cf);

--- a/Admin/lib/Tools/makedist_bundle	Tue Oct 27 15:17:02 2015 +0000
+++ b/Admin/lib/Tools/makedist_bundle	Tue Oct 27 22:19:56 2015 +0100
@@ -227,7 +227,6 @@
     mv "$ISABELLE_TARGET/contrib/macos_app" "$TMP/."
 
     perl -pi \
-      -e 's,\Qaction-bar.shortcut=C+ENTER\E,action-bar.shortcut=\naction-bar.shortcut2=C+ENTER,g;' \
       -e "s,lookAndFeel=.*,lookAndFeel=com.apple.laf.AquaLookAndFeel,g;" \
       -e "s,delete-line.shortcut=.*,delete-line.shortcut=C+d,g;" \
       -e "s,delete.shortcut2=.*,delete.shortcut2=A+d,g;" \