Fix porting mistake that caused clicking on the editor to misbehave (#3583)

We used `width` instead of `height` in the "pixels-to-point" conversion
code, which would cause clicks to not work correctly when the width was
smaller than the `y` coordinate.

Release Notes:

- N/A

crates/editor2/src/element.rs

@@ -2950,7 +2950,7 @@ impl PositionMap {
     ) -> PointForPosition {
         let scroll_position = self.snapshot.scroll_position();
         let position = position - text_bounds.origin;
-        let y = position.y.max(px(0.)).min(self.size.width);
+        let y = position.y.max(px(0.)).min(self.size.height);
         let x = position.x + (scroll_position.x * self.em_width);
         let row = (f32::from(y / self.line_height) + scroll_position.y) as u32;