Add 'AMLR standard' Shiny box

[smwoodman]

Add an 'AMLR standard' wrapper around shinydashboard::box() for use in AMLR shiny apps. Basically, a function that is a call to shinydashboard::box(), with defaults.

This will likely make the following the default: box(title = "todo", status = "warning", solidHeader = FALSE, width = ##, collapsible = TRUE)