move some things to main that can be and fix testmod

smooth category scrolling
individual reset buttons for all controllers
separate Dimension into Dimension and MutableDimension to prevent mods from modifying controller dimensions without invoking the hooks
made the dimension field private in AbstractWidget so people can't modify it without the method setDimension
new Option API method to check if pending value is equal to default value
add documentation to ConfigInstance
fix bug where Option#requestSetDefault and Option#forgetPendingValue implementations weren't notifying listeners

Fix search not behaving properly with default collapsed option groups
Minor refactors

improved tooltips
`ButtonOption` now consumes itself, so you can access it when building.