Display keymap errors on initial load (#23394)

Also fixes issue introduced in #23113 where changes to keyboard layout
would not cause reload of keymap configuration.

Closes #20531

Release Notes:

- N/A

crates/util/src/markdown.rs

@@ -1,7 +1,7 @@
 use std::fmt::{Display, Formatter};
 
 /// Markdown text.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct MarkdownString(pub String);
 
 impl Display for MarkdownString {