### Godot version

4.0b10

### System information

Linux/Manjaro

### Issue description

Most dialogs in the editor scale their text field Controls to fit the whole window when it's resized, but the plugin creation dialog does not: 
![image](https://user-images.githubusercontent.com/24468819/210095286-e53bc450-dcdc-472c-acc7-f8b3532a0ca2.png)


### Steps to reproduce

1. Go to Project Settings -> Plugins -> Create New Plugin
2. Resize the new dialog

### Minimal reproduction project

N/A
grid->add_child(author_spacer);
	author_edit = memnew(LineEdit);
	author_edit->set_placeholder("Godette");
	grid->add_child(author_edit);
	
	Label *version_lb = memnew(Label);
	version_lb->set_text(TTR("Version:"));
	version_lb->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_RIGHT);
	grid->add_child(version_lb);
	Control *version_spacer = memnew(Control);
	grid->add_child(version_spacer);
	version_edit = memnew(LineEdit);
	version_edit->set_placeholder("1.0");
	grid->add_child(version_edit);
	
	Label *script_option_lb = memnew(Label);
	script_option_lb->set_text(TTR("Language:"));
	script_option_lb->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_RIGHT);
	grid->add_child(script_option_lb);
	Control *script_opt_spacer = memnew(Control);
	grid->add_child(script_opt_spacer);
	script_option_edit = memnew(OptionButton);
	int default_lang = 0;
	for (int i = 0; i < ScriptServer::get_language_count(); i++) {
		ScriptLanguage *lang = ScriptServer::get_language(i);
		script_option_edit->add_item(lang->get_name());
		if (lang->get_name() == "GDScript") {
			default_lang = i;
		}
	}