Add a "Nearby" list on the Item panel selection that is customizable

[MōnoSimeone]

When we discuss visitor experience it's not only about finding a location but also presenting what other nearby locations/POI that user may be interested in based on the selected location.

For example, a user searching for a meeting room may also be interested in the nearest: bathrooms, water fountains, and vending machines. While a user searching for an ATM may be interested in the nearest: Restaurants, Gift Shops, or parking lots.

When the user searches for an POI or choses a location on the map, the item panel (right-side) opens to display the room/POI information. In the panel, a "Nearby" list will display category items that the user can click on to zoom to or get directions to.

Indoors authors will configure the panel to show certain categories based on a set expressions. For example, Expression 1: From Layer "Units" Field="RoomType" Value="Conference Room" then show category A, B, C in Nearby list.

Expression 2: From Layer "ATM" Field="None" Value="None" then show category C, D, E in Nearby list.

Additional parameters:
- set number of categories
- set number of item per category
- enable nearby list when user clicks map location with no features
--- a single expression used for any user click that only returns coordinates (no features are selected; commonly exterior)

The Nearby list will show the nearest 3 items from categories pre-defined by the authors with a link in each category section to "Explore more" that would open the Explore panel and to the specific category.

NEARBY
Bathrooms (Explore more)
- 101
- 102
- 103
Water Fountains (Explore more)
- 105
- 110
- 115
Vending Machines (Explore more)
- 120
- 140
- 160