don't raise events in FixInvalidInput to prevent caret movement in undo

Studio/CelesteStudio/Editing/Document.cs

@@ -404,7 +404,15 @@ public void PushChange(int minRow, int maxRow) {
         public void Dispose() {
             document.updateStack.Pop();
 
-            if (!raiseEvents || currMinRow == -1 || currMaxRow == -1) {
+            if (!raiseEvents) {
+                return;
+            }
+            if (currMinRow == -1 || currMaxRow == -1) {
+                if (raiseEvents) {
+                     // Revert the undo-stack entry to prevent empty entries
+                     document.undoStack.Undo();
+                }
+
                 return;
             }
 
@@ -568,6 +576,10 @@ public void InsertLines(int row, string[] newLines) {
     }
 
     public void ReplaceLine(int row, string text) {
+        if (Lines[row] == text) {
+            return;
+        }
+
         var newLines = text.SplitDocumentLines();
         ReplaceLines(row, newLines);
     }

Studio/CelesteStudio/Editing/Editor.cs

@@ -408,7 +408,7 @@ public void FixInvalidInputs() {
         }
     }
     private void FixInvalidInput(int row) {
-        using var __ = Document.Update();
+        using var __ = Document.Update(raiseEvents: false);
 
         // Frameless action lines are only intended for editing and shouldn't be part of the final TAS
         if (ActionLine.TryParse(Document.Lines[row], out var actionLine)) {