Added support for volumes in the file tree browser
Added extFilter and showDeleted filtering
Added grid
Whitespace: Indent and prettify tree/index.html
Whitespace: Indent and prettify tree/grid.html
Remove https: protocol specification from jQuery UI CDN URL
Add Underscore as dependency of tree view
Use Underscore for processing data structure in jstree view
Rename variable root_node to disk_image
Let jQuery encode the URLs for jstree elements
Declare create_tree using function declaration style
Extract recreate_tree() function
Trigger jstree recreation based on change event instead of click
Make jstree filter controls human-friendly and accessible
Style jstree filter controls with CSS
Rename #using_json to #tree-container in jstree view
Extract ROOT_ID constant
Extract settings object in jstree view
Use jQuery .prop() to get checkbox state

.is() checks if the element matches a CSS selector, while .prop() checks
the DOM state. The latter is what we want to inspect.
Disable paging in jstree