Fix issue #963#964

Alan052918 wants to merge 3 commits into

dmfs:masterdmfs/opentasks:masterfrom

Alan052918:issues/963-not-identifying-and-rejecting-tasks-titled-all-whitespaces-as-empty-taskAlan052918/opentasks:issues/963-not-identifying-and-rejecting-tasks-titled-all-whitespaces-as-empty-taskCopy head branch name to clipboard