tooledit: display up to 6 significant digits (SF#3032618)
tooledit: display up to 6 significant digits (SF#3032618)

Before this change, exactly 4 significant would be displayed
regardless of how the number was formatted in the tool table.
Now, up to 6 digits will be displayed.

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