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)