[IDEA] [MCAL] Show bundled JVM version number

[ChristopherSchultz]

When given the choice of which JVM to use, MCAL has three options:

(x) Bundled
( ) Default
( ) Custom: [fill-in the path, here]

It would be great to advertise the version of the bundled JVM just for the user's information.

In fact, it would be kind of great to be able to detect all 3 of those versions and display them. It's particularly interesting to know e.g. if there is not an option to pick "Default" because there is no JVM installed on the system (outside of the one bundled with MCAL, of course).