Theme apply not working (from issue #58)

[frank-packer]

Can see code in place to apply the theme as per issue #58, however it's not working.
In Angular, if I run my onInit lifecycle hook as follows, it works:

async ngOnInit() {
const qApp = await qdtComponents.qAppPromise;
qApp.theme.get().then((theme) => {
theme.apply();
});
}

This is the same basic code that's being executed in the component, but not working there.