hide number of pages if only one page is available (fixes #1259)
hide number of pages if only one page is available (fixes #1259)

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