Replace Konqueror logos with official (KDE’s) renders

Konqueror, as rendered by the people behind KDE (in most sizes) and Inkscape (24 and 512, Inkscape was also apparently used by the KDE folks so it should not matter).  Also replaced with a .svg generated by Inkscape from the official `.svgz` .

The previous renders were wrong, the cogwheel was dark behind the globe.