Extract Common Variables To Reduce Clutter

- Extract shell, table, table column and color variables
- Extract packing for UI elements into one method
Set UI Elements to Initialise Upon Class Creation

- Add a new text area for single line output messages
- Add a label to indicate input text area
Remove Unnecessary System Printouts
Extract Setting of Table Item Colours
Prepare To Merge

- Remove Feedback class from tracked files
Add Feedback Class Back For Merge