exceptions (!= IOException) were swallowed - now show all exceptions in a popup, so internal errors don't get hidden
[de] fix false alarm
[de] fix false alarm: "einen Hochwasser führenden Fluss"
[de] fix false alarm: "nichts Wichtigeres"
[de] detect agreement problem with participle: "die erwähnt Konferenz" -> "die erwähnte Konferenz"
[de] new rule: "bitte prüfen sie" -> "bitte prüfen Sie" (etc.)