Bug 1354117 - update customize mode button state test, r=johannh

Again, this test is mostly useless now, so I would also be fine with just removing it.

MozReview-Commit-ID: BwOGQ5pwSQd

--HG--
extra : rebase_source : 1e5b961e4f0f9f17d0aee3e6cd3aeb1d6bc75741

browser/components/customizableui/test/browser_customizemode_contextmenu_menubuttonstate.js

 "use strict";
 
 add_task(async function() {
-  await SpecialPowers.pushPrefEnv({set: [["browser.photon.structure.enabled", false]]});
   ok(!PanelUI.menuButton.hasAttribute("open"), "Menu button should not be 'pressed' outside customize mode");
+  ok(!PanelUI.menuButton.hasAttribute("disabled"), "Menu button should not be disabled outside of customize mode");
   await startCustomizing();
 
-  is(PanelUI.menuButton.getAttribute("open"), "true", "Menu button should be 'pressed' when in customize mode");
+  ok(!PanelUI.menuButton.hasAttribute("open"), "Menu button should still not be 'pressed' when in customize mode");
+  is(PanelUI.menuButton.getAttribute("disabled"), "true", "Menu button should be disabled in customize mode");
 
-  let contextMenu = document.getElementById("customizationPanelItemContextMenu");
+  let contextMenu = document.getElementById("customizationPaletteItemContextMenu");
   let shownPromise = popupShown(contextMenu);
   let newWindowButton = document.getElementById("wrapper-new-window-button");
   EventUtils.synthesizeMouse(newWindowButton, 2, 2, {type: "contextmenu", button: 2});
   await shownPromise;
-  is(PanelUI.menuButton.getAttribute("open"), "true", "Menu button should be 'pressed' when in customize mode after opening a context menu");
+  ok(!PanelUI.menuButton.hasAttribute("open"), "Menu button should still not be 'pressed' when in customize mode after opening a context menu");
+  is(PanelUI.menuButton.getAttribute("disabled"), "true", "Menu button should still be disabled in customize mode");
+  is(PanelUI.menuButton.getAttribute("disabled"), "true", "Menu button should still be disabled in customize mode after opening context menu");
 
   let hiddenContextPromise = popupHidden(contextMenu);
   contextMenu.hidePopup();
   await hiddenContextPromise;
-  is(PanelUI.menuButton.getAttribute("open"), "true", "Menu button should be 'pressed' when in customize mode after hiding a context menu");
+  ok(!PanelUI.menuButton.hasAttribute("open"), "Menu button should still not be 'pressed' when in customize mode after hiding a context menu");
+  is(PanelUI.menuButton.getAttribute("disabled"), "true", "Menu button should still be disabled in customize mode after hiding context menu");
   await endCustomizing();
 
   ok(!PanelUI.menuButton.hasAttribute("open"), "Menu button should not be 'pressed' after ending customize mode");
+  ok(!PanelUI.menuButton.hasAttribute("disabled"), "Menu button should not be disabled after ending customize mode");
 });