Add form, url, template and view; no functionality yet

Note that the index page group button and the group selection within a work spec have a temporary display none to hide it so that it can be merged

ldvspec/lofardata/forms.py

@@ -52,7 +52,7 @@ class WorkSpecificationForm(ModelForm):
 
 class GroupForm(ModelForm):
     obs_ids = CharField(label='SAS IDs',
-                        help_text="A list of SAS IDs separated with a comma+space. Example: 123, 456, 789",
+                        help_text="A list of SAS IDs separated with a comma. Example: 123, 456, 789",
                         required=True)
 
     class Meta: