insarmaps2.0 enhancement: button for latest ingests

[falkamelung]

It will be nice to have a button to show the latest ingest and/or scroll-down window showing the latest 5-10 ingests. Clicking will activate and show this data set.

Reason: The way how insarmaps is used it to save the URL somewhere and use it to look at a dataset. We normally don;t follow the blue boxes to find a dataset, although this is still used sometimes. This button would make it easier to get to the latest ingests. (By the way, right now for the testing it would be very handy).