### Godot version

4.0 stable

### System information

Manjaro Linux, kernel 6.1.1-1-MANJARO, AMD Ryzen 5 3600, AMD RX 580

### Issue description

The `wrap_mode` property of the `TextEdit` node doesn't seem to really do anything. Setting it to `LINE_WRAPPING_BOUNDARY` simply means that there won't be an horizontal scrollbar if the text overshoots the boundary, instead of actually forcing the text to the next line so that it stays visible.

### Steps to reproduce

Create a TextEdit node and set its `wrap_mode` property to `LINE_WRAPPING_BOUNDARY`

### Minimal reproduction project

[WrapBugDemo.zip](https://github.com/godotengine/godot/files/10875969/WrapBugDemo.zip)

} else if (line_background_color != Color(0, 0, 0, 0)) {
							if (rtl) {
								RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2(size.width - (xmargin_end + 2) - minimap_width, i * 3, minimap_width, 2), line_background_color);
							} else {
								RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2((xmargin_end + 2), i * 3, minimap_width, 2), line_background_color);
							}
						}
						Color previous_color;
						int characters = 0;
						int tabs = 0;
						for (int j = 0; j < str.length(); j++) {
							const Variant *color_data = color_map.getptr(last_wrap_column + j);
							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;
								}
							}
							color = current_color;
							if (j == 0) {
								previous_color = color;
							}
							int xpos = indent_px + ((xmargin_end + minimap_char_size.x) + (minimap_char_size.x * j)) + tabs;
							bool out_of_bounds = (xpos >= xmargin_end + minimap_width);
							bool whitespace = is_whitespace(str[j]);
							if (!whitespace) {
								characters++;
								if (j < str.length() - 1 && color == previous_color && !out_of_bounds) {
									continue;
								}