- Testing: Separate tests into unit/ui; split UI tests by specific domain;

setup browser-bug folder and ui issues folder
- Testing: Create test utilities for selecting English and visiting and
  approving storage
- Testing: Add test for tool selection

cypress/integration/unit/browser-bugs/removeItem-setAttribute.js

@@ -0,0 +1,11 @@
+
+describe('Browser bugs', function () {
+  it('removeItem and setAttribute test (Chromium 843901; now fixed)', function () {
+    // See https://bugs.chromium.org/p/chromium/issues/detail?id=843901
+    const elem = document.createElementNS('http://www.w3.org/2000/svg', 'rect');
+    elem.setAttribute('transform', 'matrix(1,0,0,1,0,0)');
+    elem.transform.baseVal.removeItem(0);
+    elem.removeAttribute('transform');
+    assert.equal(elem.hasAttribute('transform'), false);
+  });
+});