Change find-as-you-type shortcuts to Ctrl+3 and S.

pkg/dartdoc/lib/src/client/dropdown.dart

Index: pkg/dartdoc/lib/src/client/dropdown.dart
diff --git a/pkg/dartdoc/lib/src/client/dropdown.dart b/pkg/dartdoc/lib/src/client/dropdown.dart
index 9865b04b5203bf911a2e0ac5e0d46aa6e9c6356f..eab7e7901b8be63d230736461329f6f5120abd42 100644
--- a/pkg/dartdoc/lib/src/client/dropdown.dart
+++ b/pkg/dartdoc/lib/src/client/dropdown.dart
@@ -322,15 +322,22 @@ void hideDropDown() {
   dropdown.style.visibility = 'hidden';
 }
 
-/** Activate search on Ctrl+F and F3. */
+/** Activate search on Ctrl+3 and S. */
 void shortcutHandler(KeyboardEvent event) {
-  if (event.keyCode == 0x46/*F*/ && event.ctrlKey ||
-      event.keyIdentifier == KeyName.F3) {
+  if (event.keyCode == 0x33/* 3 */ && event.ctrlKey ||
+      event.keyCode == 0x53/* S */) {
     searchInput.focus();
     event.preventDefault();
   }
 }
 
+/**
+ * Setup window shortcuts.
+ */
+void setupShortcuts() {
+  window.on.keyDown.add(shortcutHandler);
+}
+
 /** Setup search hooks. */
 void setupSearch(var libraries) {
   libraryList = libraries;
@@ -343,5 +350,4 @@ void setupSearch(var libraries) {
   searchInput.on.reset.add(updateDropDown);
   searchInput.on.focus.add((event) => showDropDown());
   searchInput.on.blur.add((event) => hideDropDown());
-  window.on.keyDown.add(shortcutHandler);
 }