Add `on_layout` to `text` and `windows`. Remove from `if_element`.

src/widgets/if_element.rs

-use kayak_core::OnLayout;
-
 use crate::core::{rsx, styles::Style, widget, Children, OnEvent, WidgetProps};
 
 /// Props used by the [`If`] widget
@@ -13,8 +11,6 @@ pub struct IfProps {
     pub children: Option<Children>,
     #[prop_field(OnEvent)]
     pub on_event: Option<OnEvent>,
-    #[prop_field(OnLayout)]
-    pub on_layout: Option<OnLayout>,
     #[prop_field(Focusable)]
     pub focusable: Option<bool>,
 }
@@ -31,7 +27,7 @@ pub struct IfProps {
 /// | `children`  | ✅        |
 /// | `styles`    | ✅        |
 /// | `on_event`  | ✅        |
-/// | `on_layout` | ✅        |
+/// | `on_layout` | ❌        |
 /// | `focusable` | ✅        |
 ///
 pub fn If(props: IfProps) {

src/widgets/text.rs

-use kayak_core::{styles::Units, Binding, Bound, CursorIcon};
+use kayak_core::{styles::Units, Binding, Bound, CursorIcon, OnLayout};
 use kayak_font::{CoordinateSystem, KayakFont};
 
 use crate::core::{
@@ -24,6 +24,8 @@ pub struct TextProps {
     pub styles: Option<Style>,
     #[prop_field(OnEvent)]
     pub on_event: Option<OnEvent>,
+    #[prop_field(OnLayout)]
+    pub on_layout: Option<OnLayout>,
     #[prop_field(Focusable)]
     pub focusable: Option<bool>,
 }
@@ -40,7 +42,7 @@ pub struct TextProps {
 /// | `children`  | ❌        |
 /// | `styles`    | ✅        |
 /// | `on_event`  | ✅        |
-/// | `on_layout` | ❌        |
+/// | `on_layout` | ✅        |
 /// | `focusable` | ✅        |
 ///
 pub fn Text(props: TextProps) {

src/widgets/window.rs

@@ -5,7 +5,7 @@ use crate::core::{
     styles::{Corner, Edge, PositionType, Style, StyleProp, Units},
     use_state, widget, Children, EventType, OnEvent, WidgetProps,
 };
-use kayak_core::CursorIcon;
+use kayak_core::{CursorIcon, OnLayout};
 
 use crate::widgets::{Background, Clip, Element, Text};
 
@@ -26,6 +26,8 @@ pub struct WindowProps {
     pub children: Option<Children>,
     #[prop_field(OnEvent)]
     pub on_event: Option<OnEvent>,
+    #[prop_field(OnLayout)]
+    pub on_layout: Option<OnLayout>,
     #[prop_field(Focusable)]
     pub focusable: Option<bool>,
 }
@@ -42,6 +44,7 @@ pub struct WindowProps {
 /// | `children`  | ✅        |
 /// | `styles`    | ✅        |
 /// | `on_event`  | ✅        |
+/// | `on_layout` | ✅        |
 /// | `focusable` | ✅        |
 ///
 pub fn Window(props: WindowProps) {