fix: don't jump away from form input to search bar

Addresses rust-lang#1020 with the suggestion from prior PR rust-lang#1101

src/theme/searcher/searcher.js

@@ -311,7 +311,7 @@ window.search = window.search || {};
 
     // Eventhandler for keyevents on `document`
     function globalKeyHandler(e) {
-        if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey || e.target.type === 'textarea') { return; }
+        if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey || e.target.type === 'textarea' || e.target.type === 'text') { return; }
 
         if (e.keyCode === ESCAPE_KEYCODE) {
             e.preventDefault();