Fix continuing historic time entries.
Fix continuing historic time entries.

All of the time entries in the AllTimeEntriesView aren't guaranteed to
be persisted. Thus need to make sure that the entry that the user is
trying to continue is marked as IsPersisted beforehand.

masterrr/mobile,eatskolnikov/mobile,peeedge/mobile,ZhangLeiCharles/mobile,masterrr/mobile,ZhangLeiCharles/mobile,eatskolnikov/mobile,eatskolnikov/mobile,peeedge/mobile