[Azoth Murm] Styled div for forwards/reposts.
[Azoth Murm] Forwarded mode in FullInfo2Replacement().

Don't show likes and repost counts for forwarded messages.
[Azoth Murm] FullMessageInfo::ForwardedMessages_.
[Azoth Murm] Recursively parse N-level forwarded messages.
[Azoth Murm] Support forwarded message IDs.

Forwarded-forwarded messages have complex IDs in the following form:
id(0) = owner0_msg0
id(k) = ownerk_msgk:(id(k-1))

Use std::stoull() instead of QString::toULongLong() to parse that.
[Azoth Murm] Format nested forwarded messages.