Hey, Riot heres a suggestion HOW ABOUT A BUTTON THAT SHOWS THE OWNED SKINS ONLY noobs
Not trying to be offensive here, but they've told us repeatedly that it'll only show owned skins... We've even seen that it'll be a tab under Profile in Collection (separate tab like Runes and Match history are right now in the client).
It'll probably work like the store but reverse (so default would show only all owned skins and you'd checkmark classes and stuff to narrow down the list) in addition to a search bar.
Edit: I found the exact teaser, it was during the video when they were previewing "emotes" three weeks ago. http://nexus.leagueoflegends.com/2017/08/dev-introducing-emotes/
Scroll down to the still shot of the video
(no need to watch the vid, you can see the skins tab in the thumbnail).