v0.2.1

• Moved help into a modal (partially done by @wvffle in #223)
• Fixed choosing a login flow when logging in
• Fixed edits by different users than the original message sender being rendered
• Fixed panic when rendering empty code block
• Fixed panic in /open command (thanks to @dec05eba in #226)
• Fixed command autocompletion (thanks to @wvffle in #222)