### 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
continue;
		}
		if (has_selection(c)) {
			
			
			
			deselect(c);
			continue;
		}
		int begin = 0;
		int end = 0;
		const PackedInt32Array words = TS->shaped_text_get_word_breaks(text.get_line_data(get_caret_line(c))->get_rid());
		for (int i = 0; i < words.size(); i = i + 2) {
			if ((words[i] <= get_caret_column(c) && words[i + 1] >= get_caret_column(c)) || (i == words.size() - 2 && get_caret_column(c) == words[i + 1])) {
				begin = words[i];
				end = words[i + 1];
				break;
			}
		}
		
		if (begin == 0 && end == 0) {
			continue;
		}
		select(get_caret_line(c), begin, get_caret_line(c), end, c);
		
		set_caret_column(end, false, c);
	}
	merge_overlapping_carets();
}
void TextEdit::add_selection_for_next_occurrence() {