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Only useful for the compiled dumpers, and I have not used it for a while.

Reviewed-by: dt

Reviewed-by: hjk

This removes the remove/set flicker in most single stepping cases.

Preparing the introduction of tooltips for the new
CDB engine. Fix some breakpoint states in CDB.

Formatting of disassembler view took too much time.

This was used to enhance the user experience in the gdb/MI (non-python)
days as the location marker was shown faster. This does not seem to
make much of a difference anymore. Removal also avoids the "show disassembly
first, source next" flicker.

Try to achieve consistency in reporting stop messages for all
engines. Report by BreakpointId if available.

get away from argument stringlists. instead, use native shell command
lines which support quoting/splitting, environment variable expansion
and redirections with well-understood semantics.

Task-number: QTCREATORBUG-542
Task-number: QTCREATORBUG-1564

To keep the breakpoint state machinery simple