### 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)

Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (int i = 0; i < caret_edit_order.size() - 1; i++) {
		int first_caret = caret_edit_order[i];
		int second_caret = caret_edit_order[i + 1];
		
		if (has_selection(first_caret) && has_selection(second_caret)) {
			bool should_merge = false;
			if (get_selection_from_line(first_caret) >= get_selection_from_line(second_caret) && get_selection_from_line(first_caret) <= get_selection_to_line(second_caret) && (get_selection_from_line(first_caret) > get_selection_from_line(second_caret) || get_selection_from_column(first_caret) >= get_selection_from_column(second_caret)) && (get_selection_from_line(first_caret) < get_selection_to_line(second_caret) || get_selection_from_column(first_caret) <= get_selection_to_column(second_caret))) {
				should_merge = true;
			}
			if (get_selection_to_line(first_caret) >= get_selection_from_line(second_caret) && get_selection_to_line(first_caret) <= get_selection_to_line(second_caret) && (get_selection_to_line(first_caret) > get_selection_from_line(second_caret) || get_selection_to_column(first_caret) >= get_selection_from_column(second_caret)) && (get_selection_to_line(first_caret) < get_selection_to_line(second_caret) || get_selection_to_column(first_caret) <= get_selection_to_column(second_caret))) {
				should_merge = true;
			}
			if (!should_merge) {
				continue;
			}
			
			int caret_to_save = first_caret;
			int caret_to_remove = second_caret;
			if (first_caret < second_caret) {
				caret_to_save = second_caret;
				caret_to_remove = first_caret;
			}
			int from_line = MIN(get_selection_from_line(caret_to_save), get_selection_from_line(caret_to_remove));
			int to_line = MAX(get_selection_to_line(caret_to_save), get_selection_to_line(caret_to_remove));
			int from_col = get_selection_from_column(caret_to_save);