Description of problem:
Most importantly, the dropdown list of rules available to be extended doesn't seem to be up-to-date. When I create two rules and try to extend one with another the list is empty. I'm usually able to fix this by restarting the server(!). On the other hand, in mortgages project it always remains empty, no way to fix.

Secondly, when I manage to get some rules in the list, there is a lot of rules from different packages, which it is not allowed to extend (according to error message during validation). If this restriction is valid, rules from different packages should not be offered for extension.

And lastly, when I try to extend a rule from the same package, I get the same validation error again: "Unable to resolve parent rule, please check that both rules are in the same package".

Version-Release number of selected component (if applicable):
ER2

How reproducible:
-

Steps to Reproduce:
-

Actual results:
As described.

Expected results:
The rule list should only contain rules from the same package and it should include rules that were creating in "runtime" without the need to rebuild the project or restart server.

Additional info: