Guided Rule Editor doesn't correctly render RDRL with abbreviated combined relation conditions

Issue

• It is possible to author rules that leave out fields when using '&&' or '||' operators consecutively. The guided editor will not display such rules properly, and an incorrect version of the rule is shown in the guided editor.
  For example,

rule "rule1"
dialect "mvel"
when
    org.kie.example.project1.Person(age != 1 &&  < 10 && > 5)
then
end

In case of "rule1", "&&" is rendered as "||"

rule "rule2"
dialect "mvel"
when
    org.kie.example.project1.Person(age != null && != 1 &&  < 10 && > 5)
then
end

In case of "rule2", only "age != null" is rendered.