Refactor Stella plugin

Summary:
1. Replace old FileSelector with the new FileSelector
2. Remove showOpenDialog from FlipperLib

Reviewed By: mweststrate

Differential Revision: D32667103

fbshipit-source-id: be8da034c2695f83b397b6c7d35bc6aee78d66e5

desktop/scripts/jest-setup-after.js

@@ -38,3 +38,18 @@ afterEach(cleanup);
 console.debug = function () {
   // Intentional noop, we don't want debug statements in Jest runs
 };
+
+// https://jestjs.io/docs/manual-mocks#mocking-methods-which-are-not-implemented-in-jsdom
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: jest.fn().mockImplementation((query) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: jest.fn(), // deprecated
+    removeListener: jest.fn(), // deprecated
+    addEventListener: jest.fn(),
+    removeEventListener: jest.fn(),
+    dispatchEvent: jest.fn(),
+  })),
+});