Bug fixes

• Rectified an issue where the Firestorm, spawned by a Flying Fortress attack, did not display an expiration timer. The Firestorm will now show an expiration timer and will expire once the timer runs out.
• Corrected the positioning issue in some platforms where shop offers were incorrectly displayed too far to the right.
• Resolved an issue on mobile devices where the cost of 2nd+ level buildings was incorrectly displayed as the cost of a 1st level building in the production flow.