* remove unnessesary file
* prepared debug view with logic
* typo
* add additional case
* moved Maintenance Page to Debug
* copy function
* comment
* html file for eqsl card images folder
* only copy files if they have a qso_id in db
* not_assigned folder
* xss_clean
* $CI to $this
* removed status field, no need for that
* class wide variabled to reduce redundancy
* adjusted view
* allow run migration agn
* missing case if user_id is also empty (deleted user/qso)
* just commented
* only allow jpg, png and gif (same as in upload)
