Current fixes

• Working notification streaming
• Search does not spawn a new column (Appears to be broken due to a TD update.)
• Hashtags don't spawn a new column (Appears to be broken due to a TD update.)
• Revert icons to their old versions (Temporarily disabled.)
• Revert round avatars to squares

Tested on

• Tampermonkey (Chrome)

Based on code snippets by

• Robin Broda (@coderobe)
• Vadim Dyachenko (@YellowAfterlife)
• Andreas N. (@pixeldesu)