Add a /friends GUI

[applenick]

Improvements to Friend system (mainly GUI)

• Add /friends toggle to turn off friend requests (Will need to add a column to user profiles)
• A cool friend GUI, alternative to /friends, will display a list of player skills in a fancy format (not a priority)

Note: have friends load async in GUI so instead of like now (where /fs takes several seconds) GUI will always open instantly then populate with friends as the data becomes available. Will improve the user experience greatly.