This function is part of a suite of functions handling the interface between the kindisperse app & R
package. Due to how shiny's interactive programming works, ordinary objects are not visible to the reactive functions
embedded in the app. The solution implemented here is to construct a custom environment, env_appdata
, that is
accessible within the app and outside of it.
This function resets the internal tempdata
environment used by the kindisperse app, keeping it from becoming
over-cluttered & freeing up space.