Move halui page from gtk 3.12 to 3.2
Move halui page from gtk 3.12 to 3.2

Signed-off-by: Nicola Quargentan <b7a80975b6dec883cec058ef7c9b8e95fb341605@quargentan.com>

ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ikcalB/linuxcnc-mirror