Patch: PaintOp preset usability improvements

[Lukast dev]

2011/1/10 Sven Langkamp <sven.langkamp at gmail.com>:
> One things that bothers me a bit is that the preset string is shown in the
> lineedit after the preset is saved and after the preset is selected. I think
> that should be empty.
>
> What do you think?

I also think it should be empty.

But I'm not sure enough. I would welcome Peter Sikking's opinion here.