[IMPROVED] Versioned password hashing support

Addresses #2047
[ADDED] Upgrades hashes after pin/password update
[ADDED] HASH_VERSION for easier hash upgrades
[FIX] HTTP(s) Detection on Mail Templates
Merge pull request #2135 from MPOS/hashing-improvements

Hashing improvements
[UPDATE] jquery to version 2.1.0
[UPDATE] resize motd in settings
Merge pull request #2136 from iAmShorty/jquery-update

[UPDATE] jquery to version 2.1.0
Merge pull request #2137 from iAmShorty/motd-resize

[UPDATE] resize motd in settings