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Works only with Archer, possibly gdb head.  It attaches now, sets breakpoints,
steps etc but cannot be stopped when running.

still quite some potential ...

So now you can choose not to automatically build before running.
And you can chose to automatically save all files before building.
The options are global and the default is the same as before.

Try to find qobject_p.h, if it exists and use its structures
to determine the child offset.

Task-number: 243747

The common code for all makesteps i mainly tracking in which directories
we are currently building. And guessing the filename from that
information. And creating a buildparser from a name.

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.