Improved file with OOD
Improved file with OOD

modified:   Client/src/GUI.py

Introduced polymorphism into GUI.py, to reduce code and
allow implementation of the buttons actions to be created
by a different file.

Sam-Dowling/SecureMail,Sam-Dowling/SecureMail,Sam-Dowling/SecureMail,Sam-Dowling/SecureMail