preview: the pinned message under a chat's header now reads the way the chat list reads it -- a pinned sticker says "Sticker" instead of its :shortcode:, a pinned poll "Poll: <question>", a pinned photo its named filename, and a deleted pinned message says so instead of showing the words the chat no longer shows. No schema change (still 23) and no migration, so this installs over any 0.1.30 build; going back below pre.79 still drops you at the account picker.