surrounded category filters on home page with quotes (fixes #1255 #1256 #1258)
surrounded category filters on home page with quotes (fixes #1255 #1256 #1258)

dainst/arachnefrontend,dainst/arachnefrontend,codarchlab/arachnefrontend,codarchlab/arachnefrontend,obensch/arachnefrontend,obensch/arachnefrontend