busybird.js, timeline.js: remove trailing commas in object literals.
timeline.js, status.tx: now toggleExtensionPane() is triggered in extension container, not in the whole status box. Now extension pane is outside bb-status-main.
busybird.css: remove left padding of li.bb-status for symmetry and compactness.
busybird.css: paddings for status texts are gathered to bb-status-text class.
status.tx, busybird.css: now rows div.bb-status-profile-images and div.bb-status-main are enclosed by the new div.status-column-container, which has overflow: hidden style. That way, the extension container can clear the floating bb-status-profile-images.
busybird.css: div.bb-status-header now has overflow: hidden style, because it contains a floating box.