Added 'save frame to ppm' button to Linux/GTK3 test program
Added 'save frame to ppm' button to Linux/GTK3 test program

trcwm/openpnp-capture,trcwm/openpnp-capture,openpnp/openpnp-capture,trcwm/openpnp-capture,trcwm/openpnp-capture,trcwm/openpnp-capture,openpnp/openpnp-capture,openpnp/openpnp-capture,openpnp/openpnp-capture,openpnp/openpnp-capture,trcwm/openpnp-capture,openpnp/openpnp-capture