Merge branch 'ms-wxwidgets-321' of github.com:drowe67/freedv-gui into ms-wxwidgets-321

USER_MANUAL.html

@@ -574,6 +574,7 @@ FMA             -       Supports FMA extensions using YMM state</code></pre>
 <li>Build system:
 <ul>
 <li>Add checks for .git folder to prevent errors when building from official release tarballs. (PR #294)</li>
+<li>Upgrade bootstrapped wxWidgets to v3.2.1. (PR #302)</li>
 </ul></li>
 <li>Enhancements:
 <ul>