[XPLAT Docs] - Preview topics have the word PREVIEW in all caps next to the topic title

[agoldenbaum]

Steps to Reproduce:

1. Navigate to a preview topic such as: https://staging.infragistics.com/products/ignite-ui-react/react/components/dashboard-tile

Result:
The title has the word PREVIEW in all caps next to it. Not sure if there is supposed to be some styling or something along those lines like is done in the current documentation? For example: https://www.infragistics.com/products/ignite-ui-react/react/components/inputs/color-editor