[BUGFIX] Correct css path to icon font
[BUGFIX] Correct css path to icon font

ffrgb/meshviewer,xf-/meshviewer-1,Freifunk-Rhein-Neckar/meshviewer,Freifunk-Troisdorf/meshviewer,rubo77/meshviewer-1,FreifunkMD/Meshviewer,ffrgb/meshviewer,freifunkMUC/meshviewer,FreifunkBremen/meshviewer-ffrgb,Freifunk-Troisdorf/meshviewer,rubo77/meshviewer-1,Freifunk-Rhein-Neckar/meshviewer,xf-/meshviewer-1,Freifunk-Rhein-Neckar/meshviewer,FreifunkBremen/meshviewer-ffrgb,hopglass/ffrgb-meshviewer,FreifunkMD/Meshviewer,freifunkMUC/meshviewer,hopglass/ffrgb-meshviewer