--> Fix bar and sampleArea overriding for some activity window dimensions.
--> Fix answer checking when no. of selected wagons are not equal to the number of wagons in correct answer.
--> Fix order of storing correct answer, at present, it is stored in reverse order.
--> Fix change of image when an image is selected and dragged in answerZone.
--> Add key navigation manual.
--> Block ok button in hint section.
--> Block hint button during memorization time.
--> Check instructions on start of the activity.
--> A̶d̶d̶ ̶a̶ ̶h̶i̶n̶t̶ ̶c̶o̶u̶n̶t̶e̶r̶,̶ ̶w̶h̶i̶c̶h̶ ̶d̶i̶s̶p̶l̶a̶y̶s̶ ̶t̶h̶e̶ ̶n̶u̶m̶b̶e̶r̶ ̶o̶f̶ ̶t̶i̶m̶e̶s̶ ̶h̶i̶n̶t̶ ̶s̶e̶c̶t̶i̶o̶n̶ ̶w̶a̶s̶ ̶o̶p̶e̶n̶e̶d̶ ̶i̶n̶ ̶a̶ ̶l̶e̶v̶e̶l̶.̶