Minor adjustments: Fix furniture spawning, player interaction

[snipercup]

Requires #89

• Fixes a bug related to movable furniture when they're spawned together with a mob. I removed the timer that I implemented before to help diagnose the crashes that happened when I was working on multi-threading
• Changed some code to the player interaction with it's environment
• Hides the tool-tip in the inventory window until the player hovers the mouse cursor on one of the items