Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
That is something you can do on your own.
Use a different selector. Also, Showcase sets the previewTooltip width in at least 2 of the CSS files (just do a search for .previewTooltip and make sure to search showcase templates only).
<style>.xenPreviewTooltip{width:auto}.previewTooltip{width:150px}</style>