gladevcp: add functions to change title and tab font
gladevcp: add functions to change title and tab font

Now when the font is changed the column title and tab font change too.
There are also separate functions to set the title and/or tab font
separately.

Signed-off-by: chris morley <663b38f0e776e9171484159033cf8a402a4c1654@hotmail.com>

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