### 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)

float rows = p_pos.y;
	rows -= theme_cache.style_normal->get_margin(SIDE_TOP);
	rows /= (minimap_char_size.y + minimap_line_spacing);
	rows += _get_v_scroll_offset();
	
	int minimap_visible_lines = get_minimap_visible_lines();
	int visible_rows = get_visible_line_count() + 1;
	int first_vis_line = get_first_visible_line() - 1;
	int draw_amount = visible_rows + (smooth_scroll_enabled ? 1 : 0);
	draw_amount += get_line_wrap_count(first_vis_line + 1);
	int minimap_line_height = (minimap_char_size.y + minimap_line_spacing);
	
	int viewport_height = (draw_amount - 1) * minimap_line_height;
	int control_height = _get_control_height() - viewport_height;
	int viewport_offset_y = round(get_scroll_pos_for_line(first_vis_line + 1) * control_height) / ((v_scroll->get_max() <= minimap_visible_lines) ? (minimap_visible_lines - draw_amount) : (v_scroll->get_max() - draw_amount));