MOBILE-549 Grades plugin: Only calculate percentage if grade exists
MOBILE-549 Grades plugin: Only calculate percentage if grade exists

muhammadumarpatel/felarc,ardock/moodlemobile,Ilmawankh/modle-elearning,akinibrahim/moodlemobile,moodlewebexapp/moodlemobile,ingeniuslearning/moodlemobile,bakasa/moodle101,iharris78/ctcswlapp,4r1y4n/moodlemobile,muhammadumarpatel/felarc,jleyva/moodlemobile,GG001/GG,Namikase/moodlemobile,ubaldojmp/Moodle-CUC,dianjiaotong/dianjiaotong_apps_android,marcusoft/Aula-Virtual,vmoll/moodlemobile,marcusoft/moodlemobile,akinibrahim/moodlemobile,moodlehq/moodlemobile,elvincasem/moodlemobileous,tang7526/moodlemobile,moodlehq/moodlemobile,CEDITE/FACETVirtual.Mobile-OLD,oustaban/moodlemobile,taher552/tahfiz,clopezlga/moodlemobile,ingoscarmorenoc/ios3,sudeepnayak/moodlemobile,stefobark/moodlemobile,vincent-nephila/amaumobile,xrdcode/moodlemobile,clopezlga/moodlemobile,oustaban/moodlemobile,guozhenqiang/hit,vincent-nephila/amaumobile,navdeep300/moodlemobile,ingoscarmorenoc/ios4,iharris78/ctcswlapp,taher552/tahfiz,bakasa/moodle101,ingoscarmorenoc/ios5,guozhenqiang/hit,ingoscarmorenoc/ios7,GG001/GG,Nithis111/AIT-Tech,danielsonnora/universidaderaffinato,dianjiaotong/dianjiaotong_apps_android,danielsonnora/universidaderaffinato,Namikase/moodlemobile,marcusoft/Aula-Virtual,techguru123/MoodM,ingoscarmorenoc/ios7,ingoscarmorenoc/ios4,techguru123/MoodM,CEDITE/FACETVirtual.Mobile-OLD,ubaldojmp/Moodle-CUC,dianjiaotong/moodle_apps_android,ingoscarmorenoc/ios6,sergiopro14/moodlemobile,marcusoft/moodlemobile,ingoscarmorenoc/ios2,xrdcode/moodlemobile,Vedran91/moodlemobile,dianjiaotong/moodle_apps_android,knowngate/eduline,elvincasem/moodlemobileous,vmoll/moodlemobile,4r1y4n/moodlemobile,Ilmawankh/modle-elearning,ingoscarmorenoc/ios2,ardock/moodlemobile,moodlewebexapp/moodlemobile,ingeniuslearning/moodlemobile,sergiopro14/moodlemobile,tang7526/moodlemobile,Nithis111/AIT-Tech,yusa55/moodlemobile,ingoscarmorenoc/ios5,Vedran91/moodlemobile,sudeepnayak/moodlemobile,ingoscarmorenoc/LLLLL,ingoscarmorenoc/ios3,navdeep300/moodlemobile,stefobark/moodlemobile,ingoscarmorenoc/ios6