### 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)

dragging_selection = true;
	Point2 mp = get_local_mouse_pos();
	Point2i pos = get_line_column_at_pos(mp);
	int line = pos.y;
	int col = pos.x;
	int caret_idx = carets.size() - 1;
	int caret_pos = CLAMP(col, 0, text[line].length());
	int beg = caret_pos;
	int end = beg;
	PackedInt32Array words = TS->shaped_text_get_word_breaks(text.get_line_data(line)->get_rid());
	for (int i = 0; i < words.size(); i = i + 2) {
		if ((words[i] < caret_pos && words[i + 1] > caret_pos) || (i == words.size() - 2 && caret_pos == words[i + 1])) {
			beg = words[i];
			end = words[i + 1];
			break;
		}
	}