Prevents a potential crash during cover generation when there is no cover present for a book in the Calibre library by checking to see if the "image" string (initialized at line 223) is still empty. If the string has been modified, confirming the existence of the cover image, said image will be copied over to the OUTPUT directory.
Also fixes a trivial capitalization error present in the text of the transfer button.
Prevents a potential crash during cover generation when there is no cover present for a book in the Calibre library by checking to see if the "image" string (initialized at line 223) is still empty. If the string has been modified, confirming the existence of the cover image, said image will be copied over to the OUTPUT directory.
Also fixes a trivial capitalization error present in the text of the transfer button.