In geocoder demo app, add a Random Addresses tab that lets users create a set of random addresses within the current map view

Create a Random Addresses tab. In this tab, add a Sample Size number box with the help text:
Enter a number between 1 and 200

Add a Random Addresses button with a dice icon(?) to the right of the sample size number box. When Random Addresses or Enter key is clicked, the app chooses N random points within the current map view and finds the nearest site to each point. The full addresses of the chosen sites are then listed in the left panel below input form and displayed as placemarks on the map. A Copy Addresses to Clipboard icon is also displayed which, when selected, allows a user to copy the randomly chosen addresses to the clipboard in CSV format (just fullAddress, lat, and lon fields).