### 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)

if (!has_selection(caret_idx)) {
		select(line, beg, line, end, caret_idx);
		carets.write[caret_idx].selection.selecting_column = beg;
		carets.write[caret_idx].selection.selected_word_beg = beg;
		carets.write[caret_idx].selection.selected_word_end = end;
		carets.write[caret_idx].selection.selected_word_origin = beg;
		set_caret_line(line, false, true, 0, caret_idx);
		set_caret_column(end, true, caret_idx);
	} else {
		if ((col <= carets[caret_idx].selection.selected_word_origin && line == get_selection_line(caret_idx)) || line < get_selection_line(caret_idx)) {
			carets.write[caret_idx].selection.selecting_column = carets[caret_idx].selection.selected_word_end;
			select(line, beg, get_selection_line(caret_idx), carets[caret_idx].selection.selected_word_end, caret_idx);
			set_caret_line(line, false, true, 0, caret_idx);
			set_caret_column(beg, true, caret_idx);
		} else {
			carets.write[caret_idx].selection.selecting_column = carets[caret_idx].selection.selected_word_beg;
			select(get_selection_line(caret_idx), carets[caret_idx].selection.selected_word_beg, line, end, caret_idx);
			set_caret_line(get_selection_to_line(caret_idx), false, true, 0, caret_idx);
			set_caret_column(get_selection_to_column(caret_idx), true, caret_idx);
		}
	}
	if (DisplayServer::get_singleton()->has_feature(DisplayServer::FEATURE_CLIPBOARD_PRIMARY)) {
		DisplayServer::get_singleton()->clipboard_set_primary(get_selected_text());
	}
	queue_redraw();
	click_select_held->start();
	merge_overlapping_carets();
}
void TextEdit::_update_selection_mode_line() {