Fix null pointer when turning with shortcut keys in movement phase.

[HoneySkull]

Fixes #5350

During the movement phase that follows a previous firing phase - when using the short cut keys "Shift-A" or "Shift-D to turn left or right results in a null pointer exception in the FiringDisplay class when it is checking for torso twist left or right.

The expression was updated to promote the check for firing display visibility and ignore event status BEFORE checking the selected entity which can be null in the FiringDisplay during the movement phase.

This bug could also cause a null pointer when trying to turn other units - not just aerospace fighters like the bug report suggests.

[Sleet01]

Looks good! I think I added the getAlreadyTwisted() functionality for the TAG-phase torso twisting, but I didn't realize it was possible for the entity to be null later on -_-;