rustdoc: make keyboard commands work when checkboxes are selected

src/librustdoc/html/static/js/main.js

@@ -419,7 +419,8 @@ function loadCss(cssFileName) {
             return;
         }
 
-        if (document.activeElement.tagName === "INPUT") {
+        if (document.activeElement.tagName === "INPUT" &&
+            document.activeElement.type !== "checkbox") {
             switch (getVirtualKey(ev)) {
             case "Escape":
                 handleEscape(ev);

src/test/rustdoc-gui/settings.goml

@@ -122,6 +122,7 @@ click: ".setting-line:last-child .toggle .label"
 assert-local-storage: {"rustdoc-disable-shortcuts": "true"}
 
 // Make sure that "Disable keyboard shortcuts" actually took effect.
+// The help popover won't exist yet.
 press-key: "?"
 wait-for-css: ("#settings-menu .popover", {"display": "block"})