remove state generic from a lot of things

core/src/widget/data.rs

@@ -2,16 +2,16 @@ use std::any::TypeId;
 
 use crate::{Widget, util::HashSet};
 
-pub struct WidgetData<State> {
-    pub widget: Box<dyn Widget<State>>,
+pub struct WidgetData {
+    pub widget: Box<dyn Widget>,
     pub label: String,
     pub event_mgrs: HashSet<TypeId>,
     /// dynamic borrow checking
     pub borrowed: bool,
 }
 
-impl<State> WidgetData<State> {
-    pub fn new<W: Widget<State>>(widget: W) -> Self {
+impl WidgetData {
+    pub fn new<W: Widget>(widget: W) -> Self {
         let mut label = std::any::type_name::<W>().to_string();
         if let (Some(first), Some(last)) = (label.find(":"), label.rfind(":")) {
             label = label.split_at(first).0.to_string() + "::" + label.split_at(last + 1).1;