update to 4.6.0 (2nd try)
sorry, changes from bnc746299 were lost since I re-used my 4.5.0 patch instead of creating a clean 4.6.0 one - integrated them now (don't have time for a clean patch right now but if there was no other change, this should be fine);
what about french help messages? - I didn't change anything there. If something needs to be fixed there, then this was either an issue before or is a bug of 4.6.0
OBS-URL: https://build.opensuse.org/request/show/110070
OBS-URL: https://build.opensuse.org/package/show/Publishing/gnuplot?expand=0&rev=31
