### 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)

ERR_FAIL_INDEX(p_caret, carets.size());
	if (!selecting_enabled) {
		return;
	}
	p_from_line = CLAMP(p_from_line, 0, text.size() - 1);
	p_from_column = CLAMP(p_from_column, 0, text[p_from_line].length());
	p_to_line = CLAMP(p_to_line, 0, text.size() - 1);
	p_to_column = CLAMP(p_to_column, 0, text[p_to_line].length());
	carets.write[p_caret].selection.from_line = p_from_line;
	carets.write[p_caret].selection.from_column = p_from_column;
	carets.write[p_caret].selection.to_line = p_to_line;
	carets.write[p_caret].selection.to_column = p_to_column;
	carets.write[p_caret].selection.active = true;
	if (get_selection_from_line(p_caret) == get_selection_to_line(p_caret)) {
		if (get_selection_from_column(p_caret) == get_selection_to_column(p_caret)) {