### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
}
	merge_overlapping_carets();
}
void TextEdit::_move_caret_to_line_end(bool p_select) {
	for (int i = 0; i < carets.size(); i++) {
		if (p_select) {
			_pre_shift_selection(i);
		} else {
			deselect(i);
		}
		
		Vector<String> rows = get_line_wrapped_text(get_caret_line(i));
		int wi = get_caret_wrap_index(i);
		int row_end_col = -1;
		for (int j = 0; j < wi + 1; j++) {
			row_end_col += rows[j].length();
		}
		if (wi == rows.size() - 1 || get_caret_column(i) == row_end_col) {
			set_caret_column(text[get_caret_line(i)].length(), i == 0, i);
		} else {
			set_caret_column(row_end_col, i == 0, i);
		}
		carets.write[i].last_fit_x = INT_MAX;
		if (p_select) {
			_post_shift_selection(i);
		}
	}
	merge_overlapping_carets();
}
void TextEdit::_move_caret_page_up(bool p_select) {