render SVGs with system colors

[Manuel Mommertz]

On Monday 27 September 2010 23:09:16 Aaron J. Seigo wrote:
 
> have you done any timings to test how long the DOM parsing takes on svgs we
> have in the theme?

Average loading time with current trunk: 11ms
Average loading time with my patch applied: 27ms

But i added a simple 'contains("current-color-scheme")' on the QByteArray. So 
the expencive double-parsing is only used if the svg really needs it.