Use ascent of the first font instead

crates/epaint/src/text/font.rs

@@ -469,14 +469,10 @@ impl Font {
     }
 
     pub(crate) fn ascent(&self) -> f32 {
-        if self.fonts.is_empty() {
-            self.row_height
+        if let Some(first) = self.fonts.first() {
+            first.ascent()
         } else {
-            let mut max_ascent = 0.0;
-            for font in &self.fonts {
-                max_ascent = f32::max(max_ascent, font.ascent());
-            }
-            max_ascent
+            self.row_height
         }
     }