Add node icons for implementation state variants
Enable up/down buttons for category node
Change class/partition/method implementation state check
Add class viewer column label decorator
Add implemented class color
Apply class viewer column label decorator
Rename add class button
Add new test class dialog
Add new test class dialog error message
Add new test class button to ClassViewer
Add class name editing support
Use class name editing support
Change implemented item color constant
Change implemented class title bar
Change implemented method color
Disallow empty name
Set initial input text
Add change button
Create general test item edit dialog
Add editor title support to test item edit dialog