Use TorrentTempData for overriding "add torrents paused" functionality
Don't overwrite WebUI password when changing preferences

The input field to change password does not contain the actual
password, but its hash. When the preferences are saved, the hashed
password is considered as a new password.
Prevent this by comparing the new password with the hash of the
previous password.

Closes #2241.
Merge pull request #2242 from pmzqla/webui-password

Don't overwrite WebUI password when changing preferences
Merge pull request #1546 from Gelmir/add_paused

Partially revert 14310f9b0503d3dffa48bdb1bf9bdd5c754fa9d4
Implement peer relevance column. Closes #1630.
Rearreange header includes in Peerlist widget.
Add info about the proxy password being saved unencrypted. Closes #1490.