* Added widgets.rs to egui for reusable widgets
* Added filterable_list egui widget
* Reworked DebugShapeAction to be a more generic EguiAction which now allows for ChatCommands (used by admin tools) as well as DebugShape drawing requests.
* Fixed egui event handling so that typing/clicking within egui windows now correctly doesn't pass these events onto the game itself
* Removed /give_item limit for stackable items
