Unused function
New improved Sample in TorrentSpeedMonitor
Implement O(1) SpeedSample::average() instead of O(N)
Merge pull request #2110 from sorokin/o1-torrent-speed-monitor

O(1) torrent speed monitor
Add "Last Seen Complete" column to transfer list

This column shows when we or one of our peers last saw a complete
copy of the related torrent.

Closes #483.
Add "Last Activity" column to transfer list

This column shows the time elapsed since the related torrent has
received or sent a chunk.

Closes #517.
Add "Total Size" column to transfer list

This column shows the total size of the related torrent taking into
account also the unwanted data.

Closes #1233.
Merge pull request #2077 from pmzqla/columns

Add new columns to transfer list
WEBUI: Protect against timing attacks. Closes #2108.
Fix status returned to banned user.
Replace Mascot with qBittorrent logo on WebUI login page.