finished versions of the pleroma nsfw censoring images

finished versions of the pleroma nsfw censoring images, in the default colour scheme as of 2019.03.15 and a transparent one to work with most custom themes
pirms 4 gadiem · 39c82203cd
--- a/nsfw-covers/nsfw.74818f9.final.png
+++ b/nsfw-covers/nsfw.74818f9.final.png
--- a/nsfw-covers/nsfw.74818f9.transparent+white.smooth.png
+++ b/nsfw-covers/nsfw.74818f9.transparent+white.smooth.png