Improve the imagehitregions for small objects

In the user tests some users had difficulties tapping the small objects successfully. Especially the hidden reward book in first WC gave difficulties to everyone, no one managed to pick it up even if they tried tapping the correct area.

Other potentially too small items are the other hidden reward books and the library receipt in the first WC.

Start by reproducing the tapping problems described in the user tests, focusing on the hidden reward book in the first WC and the library receipt. Find where the image hit regions for these objects are defined and compare them with the visible objects. Done means the listed small objects can be tapped reliably, including the other hidden reward books.

Written by the indexing model from the issue text.