Defocus search bar in rustdoc pages

Escape now removes focus from the search bar

src/librustdoc/html/static/main.js

@@ -258,6 +258,7 @@
                 addClass(search, "hidden");
                 removeClass(document.getElementById("main"), "hidden");
             }
+			defocusSearchBar();
             break;
 
         case "s":
@@ -1884,3 +1885,8 @@
 function focusSearchBar() {
     document.getElementsByClassName('search-input')[0].focus();
 }
+
+// Removes the focus from the search bar
+function defocusSearchBar() {
+    document.getElementsByClassName('search-input')[0].blur();
+}