Use object deletion support for memory optimization

[promovicz]

The applet should use object deletion when available to shrink the data array.

It should do so both for install-time configuration and when written by command.

[martinpaljak]

Object deletion, meaning... ?

[promovicz]

Decided not to do this as it just complicates things.

@martinpaljak Object deletion in this context means garbage collection, ie JCSystem.requestObjectDeletion().