When I use the Excused Absence Extension page (Mac Chrome, not sure it matters)
and I select a valid homework, enter a valid student and a number of days late
(leaving the date field blank) I get an error. This used to work....
In order to enter an extension I have to enter the extension by manually chosing the
date the desired number of days after the deadline.

The original design was

Pending submission results currently shows something like 0/10 points -- bad! Should show "In grading" or something.

Possible solution (pseudocode):

String getStatusText() {
...
if (status == unknown) {
  return "In grading"
}
...
}

Expected Behavior: A list of all students within one 'Übungsgruppe'.

Actual Behavior: Before first hand-in, only those Students were visible who had already handed in a solution. However the 'Send E-Mail To Group' still sent a Mail to all Members.