Changes to pack order screen appearance
BT import customs type unk for USA
Created model & controllers for config_value
Changed get value function

Changed the get value by code function for ConfigValue and FileResource
Adjusted drop down to configValue form
Removed split column from ready to pack screen
Added config value link to control panel
Changed format of top filter bar
Adjusted config value function
Small change to top filter bar
New filter system for ready to pack

Re-built the filter system for the ready to pack screen by moving the
code to generate the filter options into the controller and the logic
and different filter sections into the package model.