### 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
}
						const Variant *color_data = (color_start >= 0) ? color_map.getptr(color_start) : nullptr;
						if (color_data != nullptr) {
							current_color = (color_data->operator Dictionary()).get("color", theme_cache.font_color);
							if (!editable && current_color.a > theme_cache.font_readonly_color.a) {
								current_color.a = theme_cache.font_readonly_color.a;
							}
						}
						Color gl_color = current_color;
						for (int c = 0; c < carets.size(); c++) {
							if (has_selection(c) && line >= get_selection_from_line(c) && line <= get_selection_to_line(c)) { 
								int sel_from = (line > get_selection_from_line(c)) ? TS->shaped_text_get_range(rid).x : get_selection_from_column(c);
								int sel_to = (line < get_selection_to_line(c)) ? TS->shaped_text_get_range(rid).y : get_selection_to_column(c);
								if (glyphs[j].start >= sel_from && glyphs[j].end <= sel_to && use_selected_font_color) {
									gl_color = theme_cache.font_selected_color;
								}
							}
						}
						float char_pos = char_ofs + char_margin + ofs_x;
						if (char_pos >= xmargin_beg) {
							if (highlight_matching_braces_enabled) {
								for (int c = 0; c < carets.size(); c++) {
									if ((brace_matching[c].open_match_line == line && brace_matching[c].open_match_column == glyphs[j].start) ||
											(get_caret_column(c) == glyphs[j].start && get_caret_line(c) == line && carets_wrap_index[c] == line_wrap_index && (brace_matching[c].open_matching || brace_matching[c].open_mismatch))) {
										if (brace_matching[c].open_mismatch) {
											gl_color = theme_cache.brace_mismatch_color;
										}
										Rect2 rect = Rect2(char_pos, ofs_y + theme_cache.font->get_underline_position(theme_cache.font_size), glyphs[j].advance * glyphs[j].repeat, MAX(theme_cache.font->get_underline_thickness(theme_cache.font_size) * theme_cache.base_scale, 1));
										draw_rect(rect, gl_color);
									}