Revert "aux configuration bugfix from dade"

Let's do things properly, see next commit.
This reverts commit 4c789a58c625495b55d034327b31b64b280f2deb.
Fix saving aux configuration
Fix loading new MSP_BOX values
Add callback to send_message function
Refresh auxiliary configuration after save

Reload the auxiliary configuration tab with new
values read from the device after each save.