fix touch-off when loaded program uses %
fix touch-off when loaded program uses %

before this, the touch off dialog would display an erroneous
error "unable to open file" in the touch-off dialog, and the OK
button would be grayed out.

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