Debugger: Move some global variables to the Dumper class

Change-Id: I5c8fd8a48f27ac70e6e39f645d64dcd788752e73
Reviewed-by: hjk <hjk121@nokiamail.com>
Fix tr()-messages in QNX.

Do not concatenate translated parts, this will result in incorrect
grammar.

Change-Id: Ieba7c948c09b927213ddd127be80651333f911ee
Reviewed-by: Daniel Teske <daniel.teske@digia.com>