[widgets] Fix a bug in chart layout

src/widgets/chart.rs

@@ -274,8 +274,16 @@ where
             y -= 1;
         }
 
-        if let Some(labels) = self.y_axis.labels {
-            let max_width = labels.iter().fold(0, |acc, l| max(l.as_ref().width(), acc)) as u16;
+        if let Some(y_labels) = self.y_axis.labels {
+            let mut max_width = y_labels.iter().fold(
+                0,
+                |acc, l| max(l.as_ref().width(), acc),
+            ) as u16;
+            if let Some(x_labels) = self.x_axis.labels {
+                if x_labels.len() > 0 {
+                    max_width = max(max_width, x_labels[0].as_ref().width() as u16);
+                }
+            }
             if x + max_width < area.right() {
                 layout.label_y = Some(x);
                 x += max_width;