(Bug 2366) Move custom text data from S2 layers to userprops

This keeps custom text the same across layouts, instead of saving it per
layout.

-Creates new userprops to store the data instead of s2 props
-Creates a widget to handle recieving and posting of userprops
-Inserts widget into the Module section of Text options, maintaining
 striping and classes
-Migrates s2 props to userprops, if the user is not using userprops
(Bug 2366) Clean-up of unnecessary code
-removed warn lines
-removed unnecessary JS
-changed header to reflect that widget is basically new code
and only shares basic subs and variable names with other widgets
Merge pull request #560 from momijizukamori/Bug2366/Customtext

(Bug 2366) Move custom text data from S2 layers to userprops