Add option to chose Optimization Policy

[odjuricicTT]

This can be a dropdown next to the run button with a list of policies to chose from. The list should be defined by the server in some form e.g.:

{
    "optimizationPolicies": ["a", "b", "c"]
}

The chosen policy will be passed when calling model execute.

[odjuricicTT]

@madcampos Please ping me for any details needed for this.