🐛 Fix 'Read more' not showing on long comments

There is some dynamic styling being done on the comments by YouTube when
they load. The delay in the comments loading seems to have caused an
issue where the styling to show 'Read more' for long comments does not
appear.

Add a hacky workaround that executes once after comments are toggled on,
which removes the extra 'hid' CSS class from long comments just as
YouTube would normally do.

script.js

@@ -9,6 +9,8 @@ function toggleComments() {
 	}	else {
 		label.textContent = 'Hide comments';
 	}
+
+	showReadMore();
 }
 
 function inject() {
@@ -31,6 +33,19 @@ function addButton() {
 	document.getElementById('toggle-comments').addEventListener('click', toggleComments);
 }
 
+function showReadMore() {
+	showReadMore = function() {}; // Become a no-op after executing.
+
+	const maxHeight = 65;
+	const commentContents = document.getElementsByClassName('comment-renderer-text-content');
+
+	for (var comment of commentContents) {
+		if (comment.scrollHeight > maxHeight) {
+			comment.nextElementSibling.classList.remove('hid');
+		}
+	};
+}
+
 (function () {
 	document.addEventListener('DOMContentLoaded', inject); // Static navigation (i.e. initial page load)
 	document.addEventListener('spfdone', inject); // Dynamic navigation (i.e. subsequent page loads)