All assembly items start secured/ready 

* All assembly items start secured (ready). Fixes #5928
* Fixes not being able to hear the beeping of infrared beam, timer and proximity sensor in the dark or in your hand, and changing the beep range to 3 for all assembly items except signaler.
* Fixes certain assembly items being usable while unsecured and not getting the unsecured warning message. Fixes #6008 
* Fixing some absolute path.