Remember focus between tests

src/server/pause.js

@@ -117,9 +117,11 @@ const controls = `
 
 document.body.insertAdjacentHTML('afterBegin', controls);
 
-document.querySelector('#skip-button').addEventListener('click', skip);
 document.querySelector('#skip-all-button').addEventListener('click', skipAll);
 
+const skipBtn = document.querySelector('#skip-button');
++skipBtn.addEventListener('click', skip);
+
 const startBtn = document.querySelector('#start-button');
 startBtn.addEventListener('click', start);
 
@@ -132,7 +134,7 @@ runBtn.addEventListener('click', run);
 const testName = document.querySelector('#test-name');
 
 /* eslint-disable no-undef, no-invalid-this */
-let currentTest;
+let currentTest, focusEl;
 beforeEach(async function() {
 	const fixture = new Promise(r => test.update = r);
 
@@ -147,7 +149,7 @@ beforeEach(async function() {
 
 		if (test.pause) {
 			runBtn.disabled = false;
-			runBtn.focus();
+			focusEl.focus();
 		}
 	});
 });
@@ -160,6 +162,7 @@ function start() {
 }
 
 function run() {
+	focusEl = runBtn;
 	runBtn.disabled = true;
 	test.run();
 }
@@ -171,6 +174,7 @@ function runAll() {
 }
 
 function skip() {
+	focusEl = skipBtn;
 	run();
 	try {
 		currentTest.skip();