FIX: [ISXB-1541] Keyboard.allKeys contain null KeyControl for deprecated key Key.IMESelected which results in exception if using sub-script operator for lookup during enumeration of allKeys.

FIX: [ISXB-1541] Keyboard.allKeys contain null KeyControl for deprecated key Key.IMESelected which results in exception if using sub-script operator for lookup during enumeration of allKeys. #2313