Add two new I think Must function to the PluginManager  for help more  code cleaning 
From my actual pluginManager but I think those two methods are the most important to be implemented.
who are 
"ToBoolean" who cope the fact it's return a true boolean without having to do the string splitting on the variable declaration which is messy.

"ToArray" Allow the use Array in plugin parameters box

Updated the pluginManager extentions because it as a typo I didn't notice lol