Issues with multiple problems

[jaksia]

When you have multiple problems loaded and switch from one to another, tags and scoring stay the same.
Also using "Uzavrieť opravovanie" closes all of the loaded problems. Would be a lot better if it only affected currently open problem.

[jaksia]

Update: When closing a problem, the solutions from the other problem don't get erased but localStorage bugs out and needs to be manually modified to display the other problem.