Dropzone security

Whenever file format different than .txt is dropped and remember box is checked out - the app will continiously crash.
LocalStorage of the browser is filled with junk - app is unable to interpret any other format than .txt so unless local storage is cleared it won't stop crashing - even after reastarting the pc !!! Only fix is to clear cache of the browser itself - very dangerous issue that needs to be avoided in component - accept only .txt and store it after format checking is done.