remove state generic from a lot of things

src/widget/position/max_size.rs

@@ -1,13 +1,13 @@
 use crate::prelude::*;
 
-pub struct MaxSize<State> {
-    pub inner: WidgetHandle<State>,
+pub struct MaxSize {
+    pub inner: WidgetHandle,
     pub x: Option<Len>,
     pub y: Option<Len>,
 }
 
-impl<State: 'static> MaxSize<State> {
-    fn apply_to_outer(&self, ctx: &mut SizeCtx<State>) {
+impl MaxSize {
+    fn apply_to_outer(&self, ctx: &mut SizeCtx) {
         if let Some(x) = self.x {
             ctx.outer.x.select_len(x.apply_rest());
         }
@@ -17,12 +17,12 @@ impl<State: 'static> MaxSize<State> {
     }
 }
 
-impl<State: 'static> Widget<State> for MaxSize<State> {
-    fn draw(&mut self, painter: &mut Painter<State>) {
+impl Widget for MaxSize {
+    fn draw(&mut self, painter: &mut Painter) {
         painter.widget(&self.inner);
     }
 
-    fn desired_width(&mut self, ctx: &mut SizeCtx<State>) -> Len {
+    fn desired_width(&mut self, ctx: &mut SizeCtx) -> Len {
         self.apply_to_outer(ctx);
         let width = ctx.width(&self.inner);
         if let Some(x) = self.x {
@@ -34,7 +34,7 @@ impl<State: 'static> Widget<State> for MaxSize<State> {
         }
     }
 
-    fn desired_height(&mut self, ctx: &mut SizeCtx<State>) -> Len {
+    fn desired_height(&mut self, ctx: &mut SizeCtx) -> Len {
         self.apply_to_outer(ctx);
         let height = ctx.height(&self.inner);
         if let Some(y) = self.y {