Subject: BUBFIX: No instance of previous code in Code-field after
successful submission in code.

Description:

1. Imported messages from django.contrib instead of passing a variable
to templates.
Subject: BUGFIX: No instance of previous code in Package-field after
successful submission of Package.

Description:
Subject: BUGFIX: No instance of previous code in Bundle-field after
successful submission of Bundle.

Description:

1. Added custom error message for dep-field
Subject: Single JS-function to toggle check-boxes.

Description: