Automatic creation of the chain of parent objects in the `set-constant` scriptlet, if necessary

[scripthunter7]

Sometimes it happens that a constant needs to be set, for which parent object(s) must also be created.

For example, if I want to set foo.bar to a trueFunc, I have to do the following:

! First, create the 'foo' object
example.com#%#//scriptlet('set-constant', 'foo', 'emptyObj')
! Then, create the property
example.com#%#//scriptlet('set-constant', 'foo.bar', 'trueFunc')

However, perhaps the 2nd rule would be enough by itself:

• if foo exists and is an object, simply set the bar property to trueFunc
• if foo does not exist, simply create it as an empty object and then set the bar prop
• if foo exists but is not an object, there are two options:
  • skip the execution of the scriptlet and do nothing
  • or overwrite it with an empty object (if possible) and then set the bar prop