Remove 'explorer' from a few Panes (#650)

While working on #549 I realized there were a few places where 'explorer' was only needed to expand the notifications console, so I stripped those out where it was easy.

src/Explorer/Panes/SettingsPane/SettingsPane.test.tsx

@@ -2,10 +2,9 @@ import { shallow } from "enzyme";
 import React from "react";
 import { DatabaseAccount } from "../../../Contracts/DataModels";
 import { updateUserContext } from "../../../UserContext";
-import Explorer from "../../Explorer";
 import { SettingsPane } from "./SettingsPane";
 const props = {
-  explorer: new Explorer(),
+  expandConsole: (): void => undefined,
   closePanel: (): void => undefined,
 };
 describe("Settings Pane", () => {