### 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
case TextServer::AUTOWRAP_WORD_SMART:
					autowrap_flags = TextServer::BREAK_WORD_BOUND | TextServer::BREAK_ADAPTIVE | TextServer::BREAK_MANDATORY;
					break;
				case TextServer::AUTOWRAP_WORD:
					autowrap_flags = TextServer::BREAK_WORD_BOUND | TextServer::BREAK_MANDATORY;
					break;
				case TextServer::AUTOWRAP_ARBITRARY:
					autowrap_flags = TextServer::BREAK_GRAPHEME_BOUND | TextServer::BREAK_MANDATORY;
					break;
				case TextServer::AUTOWRAP_OFF:
					break;
			}
			text.set_brk_flags(autowrap_flags);
			text.set_width(wrap_at_column);
		} else {
			text.set_width(-1);
		}
		text.invalidate_all_lines();
		_update_placeholder();
	}
	
	int first_vis_line = get_first_visible_line();
	if (is_line_wrapped(first_vis_line)) {
		first_visible_line_wrap_ofs = MIN(first_visible_line_wrap_ofs, get_line_wrap_count(first_vis_line));
	} else {
		first_visible_line_wrap_ofs = 0;
	}
	set_line_as_first_visible(first_visible_line, first_visible_line_wrap_ofs);
}
void TextEdit::_update_scrollbars() {