v0.7.7

• Login-code detection no longer mistakes tracking-link gibberish for a code:
  URLs are ignored entirely when scanning for one-time codes, so newsletters
  with "use the code …" wording next to tracking links stop offering a bogus
  code pill.
• Tips that teach a setting now carry an Open settings button that jumps
  straight to the setting's row and highlights it — including the undo-send
  tip, which previously offered no way to change the window it quoted.
• Messages with fixed-width layouts — Gmail signatures, wide newsletter
  templates — now fit the reading pane: over-wide blocks shrink and their text
  wraps instead of forcing horizontal (and a spurious vertical) scrollbars on
  the message.
• Attachments sent from Gmail's composer now show up: the attachment row, the
  thread list's paperclip, and forwarding all recognize files that carry a
  Content-ID without being used inline — previously such attachments were
  invisible and silently dropped from forwards. Already-synced mail is fixed on
  the next launch.