MOBILE-1987 assign: Fix Invalid date and bad button text
MOBILE-1987 assign: Fix Invalid date and bad button text

mvvkiev/moodlemobile2,Andydadra/moodlemobile2,beppinu/moodleapp,knurmi/MoodleTest,NEEDS-SAL/SOrCEv3,romit19/SOrCEv3,balirwa/logs,NEEDS-SAL/SOrCEv3,jnguy054/moodlemobile2,mvvkiev/moodlemobile2,NEEDS-SAL/SOrCEv3,Diaa75/moodlemobile2,balirwa/logs,romit19/SOrCEv3,romit19/SOrCEv3,romit19/SOrCEv3,balirwa/logs,jnguy054/moodlemobile2,bmmg888/moodlemobile2,dpaloucva/moodlemobile2,balirwa/logs,beppinu/moodleapp,dpaloucva/moodlemobile2,sulzer/moodlemobile2,romit19/SOrCEv3,chester666/moodlemobile,Diaa75/moodlemobile2,NEEDS-SAL/SOrCEv3,bmmg888/moodlemobile2,arahimahmad/moodlemobile2,chester666/moodlemobile,Andydadra/moodlemobile2,NEEDS-SAL/SOrCEv3,balirwa/logs,chester666/moodlemobile,bmmg888/moodlemobile2,balirwa/logs,bmmg888/moodlemobile2,arahimahmad/moodlemobile2,knurmi/MoodleTest,arahimahmad/moodlemobile2,romit19/SOrCEv3,sulzer/moodlemobile2,sulzer/moodlemobile2,NEEDS-SAL/SOrCEv3