Debugger: Move listOfLocals to Dumper class

We will need access to more dumper data later.

Change-Id: Id8fe09b192ac7d2ae822a0323cda13c0e2ff81e3
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>
Debugger: Rename variables named 'type' in dumpers

It's confusing in the presence of the global function of that name,
and it's better to distinguish type names and type objects anyway.

Change-Id: I3e0674dbc96a8e2b245ed61fabd2fe7cac5a72e5
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>