[Azoth Xoox] Removed VK checks.
[Azoth] Added IHaveEntityTime for #1639.
[Azoth Xoox] ClientConnection::GetEntityTimeManager() for #1639.
[Azoth Xoox] Implement IHaveEntityTime for #1639.
[Azoth] Update entity time on tooltip rebuild of possible for #1639.
[Azoth] Mark tooltips containing client_time as dirty for #1639.
[Azoth] Format & display client_time in tooltips.

This finally closes #1639.
Merge branch 'master' of github.com:0xd34df00d/leechcraft