### Godot version

v4.0.beta.custom_build [13f0158]

### System information

Windows 10

### Issue description

When doing operations (`begin_complex_operation` and `end_complex_operation`) with multiple selections in TextEdit, some of these selections don't revert upon undo. This behavior is affects some of script editor's operations, like duplicate selection and delete lines.

### Steps to reproduce

Open script editor, make multiple selections. Keep in mind what you have selected. Do duplicate selection (ctrl+shift+D). Undo (ctrl+Z). Compare the result to what you remember.

### Minimal reproduction project

N/A
const PackedInt32Array words = TS->shaped_text_get_word_breaks(text.get_line_data(get_caret_line(caret_idx))->get_rid());
			if (words.is_empty() || column <= words[0]) {
				
				column = 0;
			} else {
				
				for (int c = words.size() - 2; c >= 0; c = c - 2) {
					if (words[c] < column) {
						column = words[c];
						break;
					}
				}
			}
			
			int overlapping_caret_index = -1;
			for (int j = i + 1; j < caret_edit_order.size(); j++) {
				
				if (get_caret_line(caret_edit_order[j]) != get_caret_line(caret_idx) && (!has_selection(caret_edit_order[j]) || get_selection_to_line(caret_edit_order[j]) != get_caret_line(caret_idx))) {
					break;
				}
				
				if ((has_selection(caret_edit_order[j]) && get_selection_to_column(caret_edit_order[j]) < column)) {
					break;
				}
				
				if ((has_selection(caret_edit_order[j]) && get_selection_from_column(caret_edit_order[j]) < column)) {
					carets.write[caret_edit_order[j]].selection.to_column = column;
					overlapping_caret_index = caret_edit_order[j];
					break;
				}