BugReportVC: Force users to add a description in crash reports.
BugReportVC: Force users to add a description in crash reports.

This makes github happier and will help us on triaging.

vector-im/vector-ios,vector-im/riot-ios,vector-im/riot-ios,vector-im/vector-ios,vector-im/vector-ios,vector-im/riot-ios,vector-im/riot-ios,vector-im/riot-ios,vector-im/riot-ios