### 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
return deselect_on_focus_loss_enabled;
}
void TextEdit::set_drag_and_drop_selection_enabled(const bool p_enabled) {
	drag_and_drop_selection_enabled = p_enabled;
}
bool TextEdit::is_drag_and_drop_selection_enabled() const {
	return drag_and_drop_selection_enabled;
}
void TextEdit::set_selection_mode(SelectionMode p_mode, int p_line, int p_column, int p_caret) {
	ERR_FAIL_INDEX(p_caret, carets.size());
	selecting_mode = p_mode;
	if (p_line >= 0) {
		ERR_FAIL_INDEX(p_line, text.size());
		carets.write[p_caret].selection.selecting_line = p_line;
		carets.write[p_caret].selection.selecting_column = CLAMP(carets[p_caret].selection.selecting_column, 0, text[carets[p_caret].selection.selecting_line].length());
	}
	if (p_column >= 0) {
		ERR_FAIL_INDEX(carets[p_caret].selection.selecting_line, text.size());
		ERR_FAIL_INDEX(p_column, text[carets[p_caret].selection.selecting_line].length() + 1);
		carets.write[p_caret].selection.selecting_column = p_column;
	}
}
TextEdit::SelectionMode TextEdit::get_selection_mode() const {