### 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)

SUBCASE("[TextEdit] key select") {
			text_edit->set_text("test");
			text_edit->grab_focus();
			SEND_GUI_KEY_EVENT(Key::RIGHT | KeyModifierMask::SHIFT)
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "t");
#ifdef MACOS_ENABLED
			SEND_GUI_KEY_EVENT(Key::RIGHT | KeyModifierMask::SHIFT | KeyModifierMask::ALT)
#else
			SEND_GUI_KEY_EVENT(Key::RIGHT | KeyModifierMask::SHIFT | KeyModifierMask::CMD_OR_CTRL)
#endif
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "test");
			SEND_GUI_KEY_EVENT(Key::LEFT | KeyModifierMask::SHIFT)
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "tes");
#ifdef MACOS_ENABLED
			SEND_GUI_KEY_EVENT(Key::LEFT | KeyModifierMask::SHIFT | KeyModifierMask::ALT)
#else
			SEND_GUI_KEY_EVENT(Key::LEFT | KeyModifierMask::SHIFT | KeyModifierMask::CMD_OR_CTRL)
#endif
			CHECK_FALSE(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "");
			SEND_GUI_KEY_EVENT(Key::RIGHT | KeyModifierMask::SHIFT)
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "t");
			SEND_GUI_KEY_EVENT(Key::RIGHT)
			CHECK_FALSE(text_edit->has_selection());
			CHECK(text_edit->get_selected_text() == "");
			SEND_GUI_KEY_EVENT(Key::LEFT | KeyModifierMask::SHIFT)