Improve typography for "What's new?" dialog (#391)

- remove <h1> (redundant)
- adjust font-sizes and margins for headings (h2, h3)

css/style.css

@@ -446,6 +446,19 @@ button.btn {
     margin: -6px 0 6px 20px;
 }
 
+/* "What's new?" (Change Log) */
+#whatsnew h2 {
+    margin: 2rem 0;
+    border-bottom: 1px solid #dee2e6;
+    padding-bottom: 0.5rem;
+    font-size: 1.3rem;
+}
+
+#whatsnew h3 {
+    margin-bottom: 1rem;
+    font-size: 1.1rem;
+}
+
 /*
 * DataTables
 */

gulpfile.js

@@ -189,6 +189,7 @@ gulp.task('boundaries', function () {
 
 gulp.task('changelog', function (cb) {
     var content = 'BR.changelog = `' + marked(fs.readFileSync('./CHANGELOG.md', 'utf-8')) + '`';
+    content = content.replace(/<h1.*<\/h1>/i, '');
     fs.writeFile(paths.dest + '/changelog.js', content, cb);
 });