Use Pixels for Text::size

graphics/src/backend.rs

@@ -32,7 +32,7 @@ pub trait Text {
     const ARROW_DOWN_ICON: char;
 
     /// Returns the default size of text.
-    fn default_size(&self) -> u16;
+    fn default_size(&self) -> f32;
 
     /// Measures the text contents with the given size and font,
     /// returning the size of a laid out paragraph that fits in the provided

graphics/src/renderer.rs

@@ -130,14 +130,14 @@ where
     const CHECKMARK_ICON: char = B::CHECKMARK_ICON;
     const ARROW_DOWN_ICON: char = B::ARROW_DOWN_ICON;
 
-    fn default_size(&self) -> u16 {
+    fn default_size(&self) -> f32 {
         self.backend().default_size()
     }
 
     fn measure(
         &self,
         content: &str,
-        size: u16,
+        size: f32,
         font: Font,
         bounds: Size,
     ) -> (f32, f32) {