remove state generic from a lot of things

src/widget/position/align.rs

@@ -1,12 +1,12 @@
 use crate::prelude::*;
 
-pub struct Aligned<State> {
-    pub inner: WidgetHandle<State>,
+pub struct Aligned {
+    pub inner: WidgetHandle,
     pub align: Align,
 }
 
-impl<State: 'static> Widget<State> for Aligned<State> {
-    fn draw(&mut self, painter: &mut Painter<State>) {
+impl Widget for Aligned {
+    fn draw(&mut self, painter: &mut Painter) {
         let region = match self.align.tuple() {
             (Some(x), Some(y)) => painter
                 .size(&self.inner)
@@ -25,11 +25,11 @@ impl<State: 'static> Widget<State> for Aligned<State> {
         painter.widget_within(&self.inner, region);
     }
 
-    fn desired_width(&mut self, ctx: &mut SizeCtx<State>) -> Len {
+    fn desired_width(&mut self, ctx: &mut SizeCtx) -> Len {
         ctx.width(&self.inner)
     }
 
-    fn desired_height(&mut self, ctx: &mut SizeCtx<State>) -> Len {
+    fn desired_height(&mut self, ctx: &mut SizeCtx) -> Len {
         ctx.height(&self.inner)
     }
 }