Page function for Shiny Gadgets
Designed to serve as the outermost function call for your gadget UI. Similar
fillPage, but always includes the Bootstrap CSS
library, and is designed to contain
miniPage(..., title = NULL, theme = NULL)
Elements to include within the page.
The title to use for the browser window/tab (it will not be shown in the document).
URL to alternative Bootstrap stylesheet.
For more information, see the Designing Gadget UI article on shiny.rstudio.com.