source: josm/trunk/images/presets/misc/wlan.svg@ 12118

see #13217 - replace about 166 png icons by svg from ​https://trac.openstreetmap.org/browser/subversion/applications/share/map-icons/svg reworked most of them (white background or halo, resizing, pixel alignement), draw a few new svg icons from png derived; remove duplicate icons; reorder icons; adapt internal preset and mappaint styles