these can potentially contain file names ...

instead of passing callback codes and dispatching them in a huge switch
statement, pass around member function pointers as real callbacks.
some codes which did not actually invoke a callback were completely
eliminated. hope this doesn't impair debugging. ;)
as a "side effect", command categorization by code is gone - there is a
proper flag field for that now.
as a real side effect, some suppressed assert failures might be back
now. fix them properly if they do ...

use typedefs and an inline function instead. that's namespace-safe and
does not produce unhelpful messages when closing parens are missing.

Plastique is manually blending with the background color, so make sure
we set the background to the highlight color when the folding marker is
hovered.

Try to load custom dumpers using shared library injection
first as it is faster and does not rely on the symbol
for LoadLibrary being known to the debugger. Keep
call loading as fallback. Move the rest of the initalization
to the first dumper call, removing the need to break at main().

This is a step towards fixing Task: 243747

RevBy:    dt <qtc-committer@nokia.com>

and find scopes (but below the main selection)

The improved traditional bar will hopefully keep everybody happy.

When the block highlighting was enabled, it would still get removed when
the mouse left the extra area. Now it changes back to the text cursor
position.

Done with mae.

The highlights would extend on top of the right column margin. It looks
better when they don't.

Done with mae.

This new look fits better with the new behaviour. Also, the
collapse/expand markers are now drawn by the style.