put more useful defaults in glNavBase
put more useful defaults in glNavBase

all subclasses need to set or define these, but most will be happy
with the defaults.

kinsamanka/machinekit,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,unseenlaser/linuxcnc,Cid427/machinekit,jaguarcat79/ILC-with-LinuxCNC,unseenlaser/machinekit,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/linuxcnc,unseenlaser/machinekit,mhaberler/machinekit,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,mhaberler/machinekit,Cid427/machinekit,cdsteinkuehler/MachineKit,aschiffler/linuxcnc,cdsteinkuehler/MachineKit,EqAfrica/machinekit,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,EqAfrica/machinekit,cdsteinkuehler/MachineKit,cnc-club/linuxcnc,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,unseenlaser/linuxcnc,araisrobo/linuxcnc,cdsteinkuehler/linuxcnc,ArcEye/MK-Qt5,cnc-club/linuxcnc,kinsamanka/machinekit,cdsteinkuehler/linuxcnc,araisrobo/linuxcnc,Cid427/machinekit,bobvanderlinden/machinekit,cnc-club/linuxcnc,cnc-club/linuxcnc,strahlex/machinekit,strahlex/machinekit,mhaberler/machinekit,araisrobo/machinekit,RunningLight/machinekit,strahlex/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,Cid427/machinekit,unseenlaser/linuxcnc,mhaberler/machinekit,aschiffler/linuxcnc,Cid427/machinekit,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,mhaberler/machinekit,ArcEye/machinekit-testing,aschiffler/linuxcnc,aschiffler/linuxcnc,RunningLight/machinekit,Cid427/machinekit,araisrobo/machinekit,ArcEye/machinekit-testing,ianmcmahon/linuxcnc-mirror,ArcEye/machinekit-testing,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,EqAfrica/machinekit,narogon/linuxcnc,araisrobo/linuxcnc,RunningLight/machinekit,strahlex/machinekit,strahlex/machinekit,ArcEye/MK-Qt5,ikcalB/linuxcnc-mirror,RunningLight/machinekit,jaguarcat79/ILC-with-LinuxCNC,kinsamanka/machinekit,araisrobo/linuxcnc,ArcEye/machinekit-testing,bobvanderlinden/machinekit,araisrobo/linuxcnc,RunningLight/machinekit,araisrobo/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,cnc-club/linuxcnc,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/linuxcnc,unseenlaser/machinekit,narogon/linuxcnc,narogon/linuxcnc,RunningLight/machinekit,araisrobo/machinekit,ArcEye/MK-Qt5,cnc-club/linuxcnc,mhaberler/machinekit,unseenlaser/linuxcnc,ArcEye/machinekit-testing,mhaberler/machinekit,jaguarcat79/ILC-with-LinuxCNC,ArcEye/MK-Qt5,EqAfrica/machinekit,cdsteinkuehler/MachineKit,araisrobo/machinekit,strahlex/machinekit,unseenlaser/linuxcnc,RunningLight/machinekit,ArcEye/MK-Qt5,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,kinsamanka/machinekit,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,ikcalB/linuxcnc-mirror,araisrobo/machinekit,bmwiedemann/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,ianmcmahon/linuxcnc-mirror,EqAfrica/machinekit,bobvanderlinden/machinekit,Cid427/machinekit,bobvanderlinden/machinekit,mhaberler/machinekit,EqAfrica/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,aschiffler/linuxcnc,cnc-club/linuxcnc,narogon/linuxcnc,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/linuxcnc,araisrobo/machinekit,unseenlaser/machinekit,strahlex/machinekit,narogon/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,kinsamanka/machinekit,araisrobo/machinekit,RunningLight/machinekit,Cid427/machinekit,bobvanderlinden/machinekit,EqAfrica/machinekit,bmwiedemann/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,unseenlaser/machinekit,bobvanderlinden/machinekit,araisrobo/machinekit,cdsteinkuehler/linuxcnc,kinsamanka/machinekit