Modularization: move bootstrap tooltip code to its own file

[Janell-Huyck]

This specific issue is related to moving the bootstrap tooltip initialization code,
$(document).on('turbolinks:load', function() {
$('[data-toggle="tooltip"]').tooltip();
})

In the header comment of app/assets/javascripts/application.js, we are instructed by the boilerplate to not place any code within the file, yet there is javascript code within the file. This issue is one of a handful for separating out individual javascript code into its own files and including them in the application.js file.

Example:

//= require some-file
//= require another-file

function some-function() {
-code-
}

some-function should be moved into its own file within app/assets/javascripts, perhaps as app/assets/javascripts/some-function.js. Then, within application.js, we need to require that new file with:
//= require some-function