HTML Widgets; New CSS class added to allow anchor tags to appear the same as links in grids

When anchor tags are shown in grids, e.g., to allow the User to click on an Account Id to view an Account, the tag is styled to look a little like a flat button with a border and slightly darker background.

A new is-grid-link CSS class has been added to allow anchor tags to be styled in the same way, e.g.:

<a href='app://formshow?form=Accounts&id=L10000' class='is-grid-link'>L10000</a>