Re: ⎕PLOT library change

[Dr . Jürgen Sauermann]

Hi,

due to serious problems with displaying APL characters in ⎕PLOT legends,
I decided to replace libxcb (which lacks essential Unicode support) with the
somewhat more modern  libgtk3.

In order to use libgtk3 you need to ./configure again. If libgtk3 is not present,
then libxcb will be used as fallback.

SVN 1319.

Enjoy,
Jürgen