Fix so days outside of internship range cannot be selected from week
overview

Change-Id: I653ae0b7cd0f6cfa41918a72df06a4c8366f86ee
Signed-off-by: Stephan <stegiemail-github@yahoo.de>
Datepickers start week on monday

Change-Id: I479346a8e924cf7f39d63c97a812d8091ac05d45
Signed-off-by: Stephan <stegiemail-github@yahoo.de>
All datepickers fixed

Change-Id: Ia5a34ef6d64ba2fc6fcf1c895ac3bbe25f919e22
Signed-off-by: Stephan <stegiemail-github@yahoo.de>