Add save button.

[David Green]

Add a save button so it can be saved without using the image viewer.

[NICO (zg-nico)]

Kubuntu 18.04. Version from system rep [qtqr/bionic,bionic,now 1.4~bzr23-1 all]. Using "Save QR-code" button is impossible: application crashes.
By taking 'whereis qtqr' result in my system i found that the application is a python script /usr/bin/qtqr. In this script just need to replace:
string 507 from this:
)
to that:
)[0]
strings 511-519 from this:
            if not fn.toLower().endsWith(u".png") \
            and not fn.toLower().endsWith(u".eps") \
            and not fn.toLower().endsWith(u".svg") \
            and not fn.toLower().endsWith(u".ansi") \
            and not fn.toLower().endsWith(u".ansi256") \
            and not fn.toLower().endsWith(u".ascii") \
            and not fn.toLower().endsWith(u".asciii") \
            and not fn.toLower().endsWith(u".utf8") \
            and not fn.toLower().endsWith(u".ansiutf8"):
To that:
            if not fn.lower().endswith(u".png") \
            and not fn.lower().endswith(u".eps") \
            and not fn.lower().endswith(u".svg") \
            and not fn.lower().endswith(u".ansi") \
            and not fn.lower().endswith(u".ansi256") \
            and not fn.lower().endswith(u".ascii") \
            and not fn.lower().endswith(u".asciii") \
            and not fn.lower().endswith(u".utf8") \
            and not fn.lower().endswith(u".ansiutf8"):
And the error will gone. Sorry for my english. Hope this will usefull to somebody.