#10 Changed the download icon
#10 Menus
#10 Deleting the request
#3 Saving the diff into the database
#3 Saving the diff into the database with an indication of the update
#3 Displays the list of keys and their status
#3 Displays the status icon
#3 Starts the loading of key information
#3 Loading the key content
#3 Edition view
#16 Diff unit test
#16 Diff for edition
#16 Filtering before export
#16 Unit test for the exchange of properties (wip) + moved the `IOContext` support classes into the `core` module.
#16 Unit test for the exchange of properties (wip)