Use "odd" style for TabContainers on base BG color

- Use the "odd" style for TabContainers that are on a background with the same color as the default TabContainer background color to add contrast

editor/editor_about.cpp

@@ -163,6 +163,7 @@ EditorAbout::EditorAbout() {
 	tc->set_tab_alignment(TabBar::ALIGNMENT_CENTER);
 	tc->set_custom_minimum_size(Size2(400, 200) * EDSCALE);
 	tc->set_v_size_flags(Control::SIZE_EXPAND_FILL);
+	tc->set_theme_type_variation("TabContainerOdd");
 	vbc->add_child(tc);
 
 	// Authors