A bunch of bug fixes

-fixed space ninjas not being able to charge directly from power cells - fixes #2139

-'fixed' Distro/Waste Monitors not displaying pressure read out when sensor was reading zero pressure - fixes #227

-removed the canmove check on camera consoles - fixes #490

-Fixed stealthmin's real ckeys showing in the admin-pm reply dialog's title - partially fixes #2163 (the href still shows at the bottom of the client... but that's true for all hrefs)

-Fixed people buckled to chairs not dropping their items when appropriate (like when dead) - fixes #2172

-Fixed people being able to use uplink functions whilst stunned/dead/etc - fixes #2144

-Added a cooldown to shuffling cards... wtf why wasn't this done when it was implemented - bah! fixes #2095