Make interpolate JS function not require the named parameter.
|Reported by:||Amin Mirzaee||Owned by:||nobody|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
when using a dictionary to fill in the strings. Switching back and forth between python and js, this
can be often times forgotton, with bad results.
With this fix, compatibility is maintained with all current utilizations.