Added complete buttons

buttons are color coded for all.  Manager shall be able to mark task,
subtask and milestones complete.  Once user clicks on any item it will
show complete if it is complete or it will show mark complete if it is
not complete.  Buttons are color coded: Red for not complete and Green
for complete!
Add Items window created
Updated add task functionality
a few minor edits
The dark background makes it difficult to read the text.
Updated add task and add subtask
Bugfixing and optimization on the createItem window. I swapped the create and cancel buttons because I kept hitting cancel when I wanted to hit create.