(optional) The options for this file explorer.
Structure:
showCheckboxes [type: Boolean, default: false] - Turn check box on or off.
initialCheckFunc [type: Boolean function (node)] - function that determines if the node should be checked when loaded.
checkFunc [type: function (node)] - handler for handling when a checkbox is checked.
isCheckEnabled [type: Boolean, default: false] - Enable/disable check boxes.
isContextMenuHidden [type: Boolean, default: false] - Disable the context menu on the explorer.