### 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
default: {
						break;
					}
				}
			}
		}
		
		Vector2i current_hovered_gutter = Vector2i(-1, -1);
		int left_margin = theme_cache.style_normal->get_margin(SIDE_LEFT);
		if (mpos.x <= left_margin + gutters_width + gutter_padding) {
			int hovered_row = get_line_column_at_pos(mpos).y;
			for (int i = 0; i < gutters.size(); i++) {
				if (!gutters[i].draw || gutters[i].width <= 0) {
					continue;
				}
				if (mpos.x >= left_margin && mpos.x < left_margin + gutters[i].width) {
					
					current_hovered_gutter = Vector2i(i, hovered_row);
					break;
				}
				left_margin += gutters[i].width;
			}
		}
		if (current_hovered_gutter != hovered_gutter) {
			hovered_gutter = current_hovered_gutter;
			queue_redraw();
		}
		if (drag_action && can_drop_data(mpos, get_viewport()->gui_get_drag_data())) {
			drag_caret_force_displayed = true;
			Point2i pos = get_line_column_at_pos(get_local_mouse_pos());