This sript refreshes all GET queries. Because of that some tests had to be modified. And api resposnes are reproducible now (sets results are changed to a "sorted" set, so with every query we should have the same response).
Second big change is that overlay iamages are stored differently (there are no overlays in submaps anymore)

session id is not visible from client side therefore before any query is made we need to make sure that token will be obtained with valid token

when opening a window that was already opened, overlays are not repainted (so there are no new not removable overlays there)