Show last timeframe for overlays in 2D viewer

By default the 2D viewer shows the first timeframe of grid overlays. Usually the customer is interested in the end result, therefore the last timeframe. When the ;ast timeframe can be displayed in the overlay in the 2D viewer, the customer can share the url of the 2D viewer with other users and show the end results.

Documentation:

https://previewsupport.tygron.com/wiki/Web_Interface

https://previewsupport.tygron.com/wiki/Overlay#Notes