ensure HWPI themes have breadcrumbs on when created #3848

#3848 

#### Changes

* In `vsite.module`'s `subsite.inc`, make sure that when a theme is inherited from a parent, that it checks for HWPI and if so turns on breadcrumbs.
* In os_breadcrumbs.module`, when a vsite is created, check that the theme for HWPI and if so turn on breadcrumbs.