Fixed redo and cursor scrolling

Fixed the issue where I forgot a bracket and redo was being called for every keypress
Added scrolling functionality so that the dom scrolls to the mathquill cursor when typing
This is very poorly made

Author: FlamedDogo99

editor/js/extension.min.js

@@ -520,6 +520,26 @@ function inputChange(event) {
 inputField.addEventListener("input", inputChange, false); // user input
 observeElement(inputField, "value", inputChange); // Mutation observer for value, thank you https://stackoverflow.com/a/61975440
 
+// This is a really dumb way of making our dom scroll to where we're writing
+// We are PRAYING that making the span element containing the textArea position:static doesn't break anything
+// so that we can use position:absolute on the textArea to move it relative to the document
+
+const mathTextArea = mathField.__controller.textarea[0]
+const mathSpan = mathField.__controller.textareaSpan[0]
+mathSpan.style.position = 'static'
+mathTextArea.style.position = "absolute"
+mathFieldElement.addEventListener('click', moveMathTextArea, false)
+mathFieldElement.addEventListener('keydown', moveMathTextArea, false)
+
+
+function moveMathTextArea() {
+    const cursorElement = mathField.__controller.cursor.jQ[0]
+    if(cursorElement) {
+        const newOffset = window.pageYOffset + cursorElement.getBoundingClientRect().top 
+        mathTextArea.style.top = newOffset + "px"
+    }
+}
+
 function catchUndo(event) {
 	const controlZPressed = event.key === 'z' && (event.ctrlKey || event.metaKey)
 	const shiftPressed = event.shiftKey;
@@ -544,10 +564,11 @@ function catchSoftwareUndo(event) {
 		undoInput();
 	}
 	if (event.inputType == 'historyRedo') {
-		if(stateIndex !== historyLength)
-		event.preventDefault();
+		if(stateIndex !== historyLength) {
+			event.preventDefault();
+		}
+		redoInput();
 	}
-	redoInput();
 
 }