All service messages are now not multiline (including pinned).
Confirmation for profile photo deleting will be added (not enabled).
Copy-by-selection should be supported in Linux version now.
Drafts that contain only reply-to-id (without text) support added.
HistoryToEnd button is always shown if there are unread messages.
HistoryToEnd button displayes unread messages count.
New service message (HistoryCleared) is handled (not displayed at all).
Global methods textlnkOver/Down/DrawOver were replaced by
static members of ClickHandler, now global state consists
of the handler pointer + host pointer, who declares callbacks
for the active and pressed handler changed events.
This will allow to use ClickHandler from different hosts
simultaneously (like HistoryItem / BotDescription / BotKeyboard).
Not yet tested.