LLAvatarActions all hooked up!

Rlva style~ So update to RLVa stuff!
Adds support for @startim and @startimto
Enables hasOpenIM and hasOpenProfile, Yay functionality!
RLV_BHVR_STARTIM and RLV_BHVR_STARTIMTO added

While I was working, I was updating LLAgentHandler, after long enough it was identical enough to the one in llpanelprofile, so we're using that now.
Cleans up llfloateravatarinfo to the point of being a floater and instancetracker wrapper for a panelavatar (profile panel)
Bypasses looking up expired names that we know via get, this should avoid chats (and profiles, but that bug never got out) never opening for people we already know the name of on a bad connection; of course, this will only cause a faster reaction on the UI's part, messages may never get sent still (and profiles may never load) if the connection is truly terrible.
Cleans up llfloaterfriends and some parts of llfloateravatarlist (avatarlist could be cleaned up more from this perhaps in the future)
May slightly look better with copy detection and without space changes..

llgivemoney.cpp changes fix up some dummy view warnings I noticed while testing these changes
llpreview.cpp changes avoid segfault caused by llfloateravatarinfo not being a preview anymore but being inside a multipreview nonetheless.

Translators, don't worry, I covered this one with updates from v3 (Except German team)