Feature: Add convenience button for match all nodes and rels query

[prrao87]

When building a new graph, it's a bit tedious to write a Cypher query to inspect all nodes or rels (up to a limit, say 25).

We should offer a convenience button *() along with a summary count of the total number of nodes and relationships in the graph, similar to how Neo4j does it.

We should provide a button like the below button in Neo4j that will auto-write the following match query:

MATCH (a)-[b]->(c) RETURN * LIMIT 25

This will allow the user to immediately run the query rather than having to type the query each and every time manually (which is slow because it involves a lot of opening and closing brackets).