revert browser newux changes (#5714)

browser/app/js/browser/__tests__/SideBar.test.js

@@ -31,4 +31,11 @@ describe("SideBar", () => {
     const wrapper = shallow(<SideBar />)
     expect(wrapper.find("Connect(BucketSearch)").length).toBe(0)
   })
+
+  it("should call clickOutside when the user clicks outside the sidebar", () => {
+    const clickOutside = jest.fn()
+    const wrapper = shallow(<SideBar clickOutside={clickOutside} />)
+    wrapper.simulate("clickOut", { preventDefault: jest.fn() })
+    expect(clickOutside).toHaveBeenCalled()
+  })
 })