ProcessConsole.computeName() refactoring and smaller fixes

- Moved final field inits to constructor
- Removed useless javadocs
- Use instanceof variables where possible
- Added "disposed" field and checks before each asyncExec() for that
- Refactored computeName() to readable code
-- split into multiple logical parts
-- made things static which are static
-- don't do anything if view is already disposed

Author: iloveeclipse