### 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)

CHECK(text_edit->has_selection(0));
			CHECK(text_edit->get_selected_text(0) == "test");
			CHECK(text_edit->get_selection_from_line(0) == 1);
			CHECK(text_edit->get_selection_from_column(0) == 0);
			CHECK(text_edit->get_selection_to_line(0) == 1);
			CHECK(text_edit->get_selection_to_column(0) == 4);
			CHECK(text_edit->get_caret_line(0) == 1);
			CHECK(text_edit->get_caret_column(0) == 4);
			CHECK(text_edit->has_selection(1));
			CHECK(text_edit->get_selected_text(1) == "test");
			CHECK(text_edit->get_selection_from_line(1) == 2);
			CHECK(text_edit->get_selection_from_column(1) == 0);
			CHECK(text_edit->get_selection_to_line(1) == 2);
			CHECK(text_edit->get_selection_to_column(1) == 4);
			CHECK(text_edit->get_caret_line(1) == 2);
			CHECK(text_edit->get_caret_column(1) == 4);
			CHECK(text_edit->get_caret_count() == 2);
			text_edit->select_word_under_caret();
			CHECK_FALSE(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "");
			SEND_GUI_ACTION("ui_text_select_word_under_caret");
			CHECK(text_edit->get_viewport()->is_input_handled());
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->has_selection(0));
			CHECK(text_edit->get_selected_text(0) == "test");
			CHECK(text_edit->get_selection_from_line(0) == 1);
			CHECK(text_edit->get_selection_from_column(0) == 0);
			CHECK(text_edit->get_selection_to_line(0) == 1);
			CHECK(text_edit->get_selection_to_column(0) == 4);
			CHECK(text_edit->get_caret_line(0) == 1);