It will now trim the columns to the number defined in the map.

Data Layer updates a "last edit date" field on the Item

Conflicts:
	django/website/data_layer/tests/item_tests.py

Data layer techdebt

Conflicts:
	django/website/hid/tests/categorize_items_tests.py

Barchart time period

When a term is related to two items and is removed from one of them,
the other item should not show as being modified.

Allow the chart count widget to have a time period. When present, apply the time period and display a legend detailing what the time period is.

Allow widgets to display error messages in the front end by raising a WidgetError (while other exceptions only display a generic message so as to avoid potential security leak)

This one covers the case where an item is removed from a term.

Transport itemcount time

small ui bug fixes on dashboard widgets

The transport layer term_itemcount when called with a date range
now returns terms that fall outside the range with count=0.

Use api to list terms

Fixed wording of categories and short names