Improve realization and logic in command entry's prompt item animations.
- Disable background colour manipulation
- Set colour for Queued status similar to another statuses.
- Change animation realization: from QTimer to QPropertyAnimation: simpler and convenient
Also disable setting queued status for expression, which we run immediatly
This commit also fix problem with QPropertyAnimation warnings (in short: we start animation, and immideatly remove animated object in qDeleteAll, of couse before animation finished)