M5.7: the quick bar's comments no longer say Fill & Sign widens it

The Text and Date controls now fit the 32 pt column, so the bar stays at its
narrowest with every tool. The centring still measures the rendered width.

crates/ui-egui/src/canvas/bars.rs

@@ -315,7 +315,7 @@ mod tests {
 
     #[test]
     fn a_wider_quick_bar_centres_by_its_own_width_and_needs_a_wider_margin() {
-        // Fill & Sign's Text tool widens the bar to 70 pt: it centres by that, and 72 pt no longer holds it.
+        // A 70 pt bar centres by that, and 72 pt no longer holds it.
         assert_eq!(quick_bar_offset(120.0, 70.0), 15.0);
         assert_eq!(quick_bar_offset(72.0, 70.0), 14.0);
     }