Fixyfixy
[Warnings] Fix sign/unsigned mismatch
Autoreplace toggle on Autoreplace toolbar button~
LLPanelLogin code cleanup
Move llavatarname.* to llmessage/ from llcommon/
Update/Modernize LLAvatarName and LLAvatarNameCache and _EVERYTHING_ they touch

Fairly certain this adds the feature in which the user may click the online notification to open a chat with the user coming online.

Translators may want to look at the xml changes of this change to see what to update

Removes old LegacyMultiAttachmentSupport patch
Moves LLAvatarName-centric functions into LLAvatarName from elsewhere.
Adds boost::signals2::connections to name polling places.
Removes more old icky static callbacks
Merge from Alchemy, credit where due~
Update notifications.xml to have a bunch of the tags from upstream to ease diffing
Update and Sync Mutelist with upstream alchemy

Satisfies the feature request for mute toggle to display mute status
Adds dynamic mute/unmute option to P2P IM dropdown.

Translators should look into the changes made in this commit for:
floater_chat_history.xml, floater_instant_message.xml, floater_instant_message_concisebuttons.xml
panel_avatar.xml has been taken care of for spanish and french, although they should be looked into more closely by the translators.

Cleanup and Sync in related places~
Removal of old static callbacks.
Moves God Names logic into LFSimFeatureHandler
Adds a custom function LLMuteList::hasMute() for quickly checking if a mute is in the internal set.
Feature request: Add the ability to use keyboard shortcuts from the login panel, whether or not the login webpage is focused
Prevent failure to create SLURL when an object chats but is not on the object list.

Fixes an issue I couldn't remember nor find on the issue tracker.

SLURLs for found objects remain unchanged.
SLURLs for objects that are not found, but we could find their owners now display the owner's position and region, with "?owner_not_object" appended to the slurl as a note to the user
SLURLs for objects that are not found, and we could not find their owners, now display as being from the position 0, 0, 0 in the users region
Fix broked World->Chat