### 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_FALSE(text_edit->has_undo());
	CHECK_FALSE(text_edit->has_redo());
	CHECK(text_edit->get_version() == 0);
	CHECK(text_edit->get_saved_version() == 0);
	text_edit->begin_complex_operation();
	text_edit->begin_complex_operation();
	text_edit->begin_complex_operation();
	text_edit->insert_text_at_caret("test");
	CHECK(text_edit->get_version() == 1);
	CHECK(text_edit->get_saved_version() == 0);
	CHECK(text_edit->has_undo());
	CHECK_FALSE(text_edit->has_redo());
	text_edit->end_complex_operation();
	
	text_edit->insert_text_at_caret(" nested");
	CHECK(text_edit->get_version() == 2);
	CHECK(text_edit->get_saved_version() == 0);
	CHECK(text_edit->has_undo());
	CHECK_FALSE(text_edit->has_redo());
	text_edit->undo();
	CHECK(text_edit->has_redo());
	text_edit->redo();
	text_edit->end_complex_operation();
	text_edit->insert_text_at_caret(" ops");
	CHECK(text_edit->get_version() == 3);
	CHECK(text_edit->get_saved_version() == 0);
	CHECK(text_edit->has_undo());
	CHECK_FALSE(text_edit->has_redo());
	text_edit->end_complex_operation();
	text_edit->tag_saved_version();