Fix TextEdit cursor update when adding or deleting text

Updating the viewport while setting the line index before the column is
set could wrongly cause the text to be scrolled down.

scene/gui/text_edit.cpp

@@ -2054,7 +2054,7 @@ void TextEdit::backspace_at_cursor() {
 		}
 	}
 
-	cursor_set_line(prev_line, true, true);
+	cursor_set_line(prev_line, false, true);
 	cursor_set_column(prev_column);
 }
 
@@ -2933,7 +2933,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 				selection.active = false;
 				update();
 				_remove_text(selection.from_line, selection.from_column, selection.to_line, selection.to_column);
-				cursor_set_line(selection.from_line, true, false);
+				cursor_set_line(selection.from_line, false, false);
 				cursor_set_column(selection.from_column);
 				update();
 			}
@@ -4282,7 +4282,7 @@ void TextEdit::_insert_text_at_cursor(const String &p_text) {
 	int new_column, new_line;
 	_insert_text(cursor.line, cursor.column, p_text, &new_line, &new_column);
 	_update_scrollbars();
-	cursor_set_line(new_line);
+	cursor_set_line(new_line, false);
 	cursor_set_column(new_column);
 
 	update();
@@ -4878,7 +4878,7 @@ int TextEdit::get_column_x_offset(int p_char, String p_str) const {
 
 void TextEdit::insert_text_at_cursor(const String &p_text) {
 	if (selection.active) {
-		cursor_set_line(selection.from_line);
+		cursor_set_line(selection.from_line, false);
 		cursor_set_column(selection.from_column);
 
 		_remove_text(selection.from_line, selection.from_column, selection.to_line, selection.to_column);
@@ -5337,7 +5337,7 @@ void TextEdit::cut() {
 		OS::get_singleton()->set_clipboard(clipboard);
 
 		_remove_text(selection.from_line, selection.from_column, selection.to_line, selection.to_column);
-		cursor_set_line(selection.from_line); // Set afterwards else it causes the view to be offset.
+		cursor_set_line(selection.from_line, false); // Set afterwards else it causes the view to be offset.
 		cursor_set_column(selection.from_column);
 
 		selection.active = false;
@@ -5369,7 +5369,7 @@ void TextEdit::paste() {
 		selection.active = false;
 		selection.selecting_mode = Selection::MODE_NONE;
 		_remove_text(selection.from_line, selection.from_column, selection.to_line, selection.to_column);
-		cursor_set_line(selection.from_line);
+		cursor_set_line(selection.from_line, false);
 		cursor_set_column(selection.from_column);
 
 	} else if (!cut_copy_line.empty() && cut_copy_line == clipboard) {
@@ -6224,11 +6224,11 @@ void TextEdit::undo() {
 
 	_update_scrollbars();
 	if (undo_stack_pos->get().type == TextOperation::TYPE_REMOVE) {
-		cursor_set_line(undo_stack_pos->get().to_line);
+		cursor_set_line(undo_stack_pos->get().to_line, false);
 		cursor_set_column(undo_stack_pos->get().to_column);
 		_cancel_code_hint();
 	} else {
-		cursor_set_line(undo_stack_pos->get().from_line);
+		cursor_set_line(undo_stack_pos->get().from_line, false);
 		cursor_set_column(undo_stack_pos->get().from_column);
 	}
 	update();
@@ -6260,7 +6260,7 @@ void TextEdit::redo() {
 	}
 
 	_update_scrollbars();
-	cursor_set_line(undo_stack_pos->get().to_line);
+	cursor_set_line(undo_stack_pos->get().to_line, false);
 	cursor_set_column(undo_stack_pos->get().to_column);
 	undo_stack_pos = undo_stack_pos->next();
 	update();