### 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 (rect.position.x < xmargin_beg) {
									rect.size.x -= (xmargin_beg - rect.position.x);
									rect.position.x = xmargin_beg;
								} else if (rect.position.x + rect.size.x > xmargin_end) {
									rect.size.x = xmargin_end - rect.position.x;
								}
								draw_rect(rect, theme_cache.search_result_color, true);
								draw_rect(rect, theme_cache.search_result_border_color, false);
							}
							search_text_col = _get_column_pos_of_word(search_text, str, search_flags, search_text_col + search_text_len);
						}
					}
					if (!clipped && highlight_all_occurrences && !only_whitespaces_highlighted && !highlighted_text.is_empty()) { 
						int highlighted_text_col = _get_column_pos_of_word(highlighted_text, str, SEARCH_MATCH_CASE | SEARCH_WHOLE_WORDS, 0);
						int highlighted_text_len = highlighted_text.length();
						while (highlighted_text_col != -1) {
							Vector<Vector2> sel = TS->shaped_text_get_selection(rid, highlighted_text_col + start, highlighted_text_col + highlighted_text_len + start);
							for (int j = 0; j < sel.size(); j++) {
								Rect2 rect = Rect2(sel[j].x + char_margin + ofs_x, ofs_y, sel[j].y - sel[j].x, row_height);
								if (rect.position.x + rect.size.x <= xmargin_beg || rect.position.x > xmargin_end) {
									continue;
								}
								if (rect.position.x < xmargin_beg) {
									rect.size.x -= (xmargin_beg - rect.position.x);
									rect.position.x = xmargin_beg;
								} else if (rect.position.x + rect.size.x > xmargin_end) {
									rect.size.x = xmargin_end - rect.position.x;
								}
								draw_rect(rect, theme_cache.word_highlighted_color);