cycle through different solutions if more than one solution is found

[rubo77]

In version 11 I added the feature, that you can see all solutions in the end if you click on the lightbulb again.

This commit was introducing another bug, so that the solver didn't work correctly any more. I had to roll it back in eb7b98f and published Version 10.2

It would be great if this would be added in a functioning way again.

[rubo77]

I don't remember, which were the bug introduced through the new functionality. It had something to do with some puzzles not being solved correctly or such

i created a new Version 13 with the same commit like in v11 in cycle-through-solutions

lets test this version and see if the bugs still arise.