autocomplete: display autocorrected tags like aliases.

Display autocorrected tags similar to aliases, with an arrow pointing at
the corrected tag, but with a dotted underline beneath the misspelled
tag to indicate that it's misspelled.

app/javascript/src/styles/common/autocomplete.scss

@@ -21,4 +21,8 @@
   .autocomplete-arrow {
     color: var(--autocomplete-arrow-color);
   }
+
+  a.tag-type-autocorrect .autocomplete-antecedent {
+    text-decoration: dotted underline;
+  }
 }