[Feature] Report features used.

[MrCoder]

We would like to understand which features has been used. It is for the following purposes:

1. Limit some capabilities on the Lite / un-licensed version;
2. Understand which feature is used the most/least.

To implement #1, it will be more user friendly to implement inside the render. For example, for the expand/collapse feature we can show an upgrade button beside the feature.

For reporting, instead of using the vue-gtag library, we should pass in a trackEven function because it has been causing issues.