Bug 22649: Add itemtype to item search results and CSV file

Bug 22649: Add itemtype to item search results and CSV file

The itemtype can be searched for in the item search form, but
it is not displayed in the result list.
This patch adds the itemtype to the display and the CSV export
file.

To test:
- Try different item searches
- Verify that the itemtype now shows in the result list
- Export to CSV
- Verify that the itemtype shows there correctly as well

Signed-off-by: Axel Amghar <axel.amghar@gmail.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>