Added Wx Application-Id.

Change-Id: I46152382be0a374019d51f18e7116aad8241e95a
Reviewed-on: https://code.wireshark.org/review/4162
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Evan Huus <eapache@gmail.com>