Minor tweaks to GUI
Hide inputs of behavior blocks when library is loaded, show when they are added to breed/condition block
When a behavior block is added to breed block and an appropriate trait is already defined, a placeholder panel for the trait block appears asking the user/student to put the trait block in the behavior block. Behavior inputs stay disabled/hidden
Merge branch 'deltatick' of github.com:aditiwagh/NetLogo into deltatick