fixes for the issueswhen user cancel app getting closedhttps://github.com/UstadMobile/UstadMobile/issues/1114when user cancel we dont need to show error messgaehttps://github.com/UstadMobile/UstadMobile/issues/1113 (commit: a037886)
code cleanup (commit: 98fc1d2)
clean up (commit: ef63943)
Minor space tidyup and variable renaming. (commit: 4a39136)