...instead of for non-alphabetic ones, as it does ever since
14620c3b "support import of key shortcut for
macro ( Excel only )"?  Things that suggest that that was a typo:

* The preceding comment.

* The fact that ooo::vba::parseKeyEvent will throw an exception for most input
  of the form '^' followed by a non-alphabetic character (see parseChar in
  filter/source/msfilter/msvbahelper.cxx).

(Found when auditing uses of <ctype.h> is* functions.  See
d8ce3f60 "Fix ooo::vba::parseKeyEvent" for
replacing isalpha with rtl::isAsciiAlpha here.)

Change-Id: I6b133c51da64192ec6aef712579ad6f55aae3b1a