### 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
if (!menu) {
		_generate_context_menu();
	}
	int idx = -1;
#define MENU_ITEM_ACTION_DISABLED(m_menu, m_id, m_action, m_disabled)                                                  \
	idx = m_menu->get_item_index(m_id);                                                                                \
	if (idx >= 0) {                                                                                                    \
		m_menu->set_item_accelerator(idx, shortcut_keys_enabled ? _get_menu_action_accelerator(m_action) : Key::NONE); \
		m_menu->set_item_disabled(idx, m_disabled);                                                                    \
	}
#define MENU_ITEM_ACTION(m_menu, m_id, m_action)                                                                       \
	idx = m_menu->get_item_index(m_id);                                                                                \
	if (idx >= 0) {                                                                                                    \
		m_menu->set_item_accelerator(idx, shortcut_keys_enabled ? _get_menu_action_accelerator(m_action) : Key::NONE); \