context menu

[slugalisk]

• menu overflows the bottom of the screen https://i.imgur.com/WJy3bC6.png
• stream length should truncate https://i.imgur.com/W9EBiJ5.png
• can't join streams for some providers https://imgur.com/a/TdwImr4
• can't join stream if the user is no longer watching it https://imgur.com/a/ZmcuvqU
• chat continues to scroll while the menu is open https://imgur.com/a/MpQgInA
• right clicking selects nick https://imgur.com/a/cvXXpZE
• add direct link to service url (eg. youtube.com url)