Update
•Added ClientList sorting algorithm
•Added toLowerCase() in the Client compareTo() method
•Added phone number display formatting
•Removed getSortedList() from ClientList
•Added a sort panel to WindowClientList
•Added a default selected sort type
•Moved appicon.png into the jar
•Made the application load the icon as a class resource
Merge branch 'master' of https://github.com/4-Bit/SubscriptionManagementSystem.git