fix: ui: Markdown popups stopped taking vertical padding into account

Fix #1688

helix-term/src/ui/markdown.rs

@@ -256,6 +256,6 @@ fn required_size(&mut self, viewport: (u16, u16)) -> Option<(u16, u16)> {
         let max_text_width = (viewport.0 - padding).min(120);
         let (width, height) = crate::ui::text::required_size(&contents, max_text_width);
 
-        Some((width + padding * 2, height))
+        Some((width + padding, height + padding))
     }
 }