Resultsviewer: parse parameters and javascript from results file

[tomfrancart]

When the resultsviewer is shown after an experiment, it receives javascript code to be injected and results parameters from the experimentfile (cf rtresultsink.cpp, line 135-136).

The results parameters and extra javascript are saved in the apr file. However, when the apr file is opened directly from APEX, they are not parsed and injected in the resultviewer, leading to different behaviour compared to viewing the resultsviewer at the end of an experiment. This should be fixed