Add a 'scale' parameter to NODE.ICON

[vyskocil]

It would be nice to have a scale parameter for icon rendering which would allow mainly to reduce somewhat some icon size without the need to use smaller icon images.

[Karry]

You mean icon parameter in the stylesheet, right?

[vyskocil]

@Karry yes.

[Framstag]

IMHO not all backend use the *.svg version for the icons, so it will possibly be just a hint. But sounds OK fore me. This would allow some more flexibility in styling (cathedral vs. chapel ;-)).

[vyskocil]

@Framstag iOS/OSX don't use *.svg but icons could be scaled, better results when scaling down of course