Change default text alignment to Center

crates/epaint/src/text/text_layout_types.rs

@@ -279,6 +279,13 @@ pub struct TextFormat {
 
     /// If you use a small font and [`Align::TOP`] you
     /// can get the effect of raised text.
+    ///
+    /// If you use a small font and [`Align::BOTTOM`]
+    /// you get the effect of a subscript.
+    ///
+    /// If you use [`Align::center`], you get text that is centered
+    /// around a common center-line, which is nice when mixining emojis
+    /// and normal text in e.g. a button.
     pub valign: Align,
     // TODO(emilk): lowered
 }
@@ -295,7 +302,7 @@ impl Default for TextFormat {
             italics: false,
             underline: Stroke::NONE,
             strikethrough: Stroke::NONE,
-            valign: Align::BOTTOM,
+            valign: Align::Center,
         }
     }
 }