Remove unneeded namespace prefix from svg.
Remove unneeded namespace prefix from svg.

Svg elements (except for mimetype icons) currently include a namespace prefix. This is not needed, and makes the resulting markup slightly less readable. All svg elements are still created with the http://www.w3.org/2000/svg namespace URI.

micmro/PerfCascade,micmro/PerfCascade,micmro/PerfCascade,micmro/PerfCascade