### 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
if (words[j] > cc) {
							cc = words[j];
							break;
						}
					}
				}
				set_caret_column(cc, i == 0, i);
			}
		} else {
			
			if (get_caret_column(i) == text[get_caret_line(i)].length()) {
				if (get_caret_line(i) < text.size() - 1) {
					set_caret_line(get_caret_line(i) + get_next_visible_line_offset_from(CLAMP(get_caret_line(i) + 1, 0, text.size() - 1), 1), false, false, 0, i);
					set_caret_column(0, i == 0, i);
				}
			} else {
				if (caret_mid_grapheme_enabled) {
					set_caret_column(get_caret_column(i) + 1, i == 0, i);
				} else {
					set_caret_column(TS->shaped_text_next_character_pos(text.get_line_data(get_caret_line(i))->get_rid(), get_caret_column(i)), i == 0, i);
				}
			}
		}
		if (p_select) {
			_post_shift_selection(i);
		}
	}
	merge_overlapping_carets();
}
void TextEdit::_move_caret_up(bool p_select) {