updated pre triage widget:

-removed stepAmount variable, because it can be assumed that we have a
proper data set that gives us a reasonable start- and end time and thus
the time period which shall be displayed by the chart; the stepMinutes
variable remains in order to be able to adjust the interval in which the
data is sampled (i.e. 10 min steps)

-removed input fields from widget, as it shall not be configurable by
user

-switched dataSource to a development instance of the icmm service in
order to have proper test data
 -update:

now there are no more backend calls (to icmm service) in the directive
controller of the pre-triage chart widget. Requirement therefore is that
the
backend call in debriefing view controller returns the full data (which
can be achieved by setting the level parameter in the get-request (i.e.
to the value 5)).