Problem description: according to the current implementation of the plain text widget, if only 1 item is selected in "Items" field and "Items location" is set to "Top", item name is not displayed at all (it is shown only when there are 2 and more items to display):

I would suggest to show item name on top even if the widget is configured to display only a single item.

Steps to reproduce:

1. Open any dashboard
2. Add a plain text item to this dashboard with the following parameters:
3. # Items - any item that has data, just make sure there is only 1 item defined in this field
4. # Items location - Top
5. Save the widget and check it on the dashboard in view mode

Result: Item name is not displayed on the widget at all.
Expected: Item name should be displayed in the header of the table, just like it is when there are 2 items to display.