Make the property loader window resisable

[MimiKLM]

Hi,

Exactly as in the subject.

Sometimes the names variables are long and could be deeply nested into containers.

Now it is difficult to use them as both windows: the main one and Selected are unresizable.

After proposed change the property loader would have all default features(behaviours) as you can expect from the window at this place.

Current situation presented on the picrure below.

[WireWeaver]

The 2016 and later property loader is resizable