remove state generic from a lot of things

core/src/event/ctx.rs

@@ -8,13 +8,13 @@ pub struct EventCtx<'a, State, Data> {
 }
 
 pub struct EventIdCtx<'a, State, Data, W: ?Sized> {
-    pub widget: WidgetRef<State, W>,
+    pub widget: WidgetRef<W>,
     pub state: &'a mut State,
     pub data: &'a mut Data,
 }
 
 impl<State: HasUi, Data, W: ?Sized> Deref for EventIdCtx<'_, State, Data, W> {
-    type Target = Ui<State>;
+    type Target = Ui;
 
     fn deref(&self) -> &Self::Target {
         self.state.ui_ref()
@@ -27,7 +27,7 @@ impl<State: HasUi, Data, W: ?Sized> DerefMut for EventIdCtx<'_, State, Data, W>
     }
 }
 
-impl<'a, State: HasUi + 'static, Data, W: Widget<State>> EventIdCtx<'a, State, Data, W> {
+impl<'a, State: HasUi + 'static, Data, W: Widget> EventIdCtx<'a, State, Data, W> {
     pub fn widget(&mut self) -> &mut W {
         &mut self.state.ui()[self.widget]
     }