don't clear errors unnecessarily
don't clear errors unnecessarily

now that the user has a way to clear the error message (by
pressing the abort button) don't clear them otherwise.

Cid427/machinekit,kinsamanka/machinekit,cnc-club/linuxcnc,bobvanderlinden/machinekit,ianmcmahon/linuxcnc-mirror,cnc-club/linuxcnc,EqAfrica/machinekit,araisrobo/machinekit,jaguarcat79/ILC-with-LinuxCNC,strahlex/machinekit,ikcalB/linuxcnc-mirror,araisrobo/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,cnc-club/linuxcnc,strahlex/machinekit,kinsamanka/machinekit,aschiffler/linuxcnc,ikcalB/linuxcnc-mirror,aschiffler/linuxcnc,unseenlaser/linuxcnc,ianmcmahon/linuxcnc-mirror,kinsamanka/machinekit,kinsamanka/machinekit,mhaberler/machinekit,ikcalB/linuxcnc-mirror,bobvanderlinden/machinekit,cnc-club/linuxcnc,narogon/linuxcnc,ArcEye/MK-Qt5,bobvanderlinden/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,cnc-club/linuxcnc,araisrobo/machinekit,araisrobo/machinekit,narogon/linuxcnc,mhaberler/machinekit,araisrobo/linuxcnc,RunningLight/machinekit,EqAfrica/machinekit,Cid427/machinekit,ArcEye/machinekit-testing,araisrobo/machinekit,ArcEye/machinekit-testing,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,RunningLight/machinekit,araisrobo/machinekit,aschiffler/linuxcnc,ArcEye/MK-Qt5,unseenlaser/machinekit,cdsteinkuehler/MachineKit,ianmcmahon/linuxcnc-mirror,bobvanderlinden/machinekit,Cid427/machinekit,araisrobo/linuxcnc,strahlex/machinekit,RunningLight/machinekit,araisrobo/machinekit,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,EqAfrica/machinekit,ianmcmahon/linuxcnc-mirror,yishinli/emc2,cdsteinkuehler/linuxcnc,yishinli/emc2,ArcEye/MK-Qt5,strahlex/machinekit,jaguarcat79/ILC-with-LinuxCNC,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/MachineKit,mhaberler/machinekit,jaguarcat79/ILC-with-LinuxCNC,ArcEye/machinekit-testing,ianmcmahon/linuxcnc-mirror,Cid427/machinekit,cdsteinkuehler/linuxcnc,RunningLight/machinekit,aschiffler/linuxcnc,strahlex/machinekit,araisrobo/machinekit,Cid427/machinekit,jaguarcat79/ILC-with-LinuxCNC,kinsamanka/machinekit,bmwiedemann/linuxcnc-mirror,bobvanderlinden/machinekit,cdsteinkuehler/linuxcnc,yishinli/emc2,cdsteinkuehler/MachineKit,RunningLight/machinekit,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,ArcEye/MK-Qt5,unseenlaser/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,EqAfrica/machinekit,bobvanderlinden/machinekit,unseenlaser/machinekit,mhaberler/machinekit,cdsteinkuehler/MachineKit,araisrobo/linuxcnc,cdsteinkuehler/linuxcnc,Cid427/machinekit,mhaberler/machinekit,RunningLight/machinekit,cdsteinkuehler/linuxcnc,narogon/linuxcnc,EqAfrica/machinekit,unseenlaser/machinekit,unseenlaser/linuxcnc,ianmcmahon/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,aschiffler/linuxcnc,mhaberler/machinekit,ArcEye/machinekit-testing,unseenlaser/linuxcnc,EqAfrica/machinekit,ArcEye/machinekit-testing,RunningLight/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/MachineKit,bobvanderlinden/machinekit,strahlex/machinekit,araisrobo/linuxcnc,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,strahlex/machinekit,ArcEye/machinekit-testing,ArcEye/MK-Qt5,kinsamanka/machinekit,Cid427/machinekit,ikcalB/linuxcnc-mirror,araisrobo/machinekit,cdsteinkuehler/MachineKit,ArcEye/machinekit-testing,mhaberler/machinekit,araisrobo/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,RunningLight/machinekit,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,unseenlaser/linuxcnc,mhaberler/machinekit,ArcEye/MK-Qt5,narogon/linuxcnc,Cid427/machinekit,cdsteinkuehler/linuxcnc,cnc-club/linuxcnc,yishinli/emc2,bobvanderlinden/machinekit,unseenlaser/linuxcnc,narogon/linuxcnc,cnc-club/linuxcnc