Fix the following bugs:
1) [EDF Editor] When selecting a row in the error list, it shows the row
on the identity/signal header, but the current file that is shown is not
highlighted in the left pane (list of EDF)

2) [EDF Editor] Task Summary is not displayed correctly for output path
and Write mode

3) [EDF Translator] IF the annotation file "does not exist" in the
folder mentioned, Java.lang.NullPointerException at
java.io.File.<init>(File.java:222) at
translator.logic.AnnotationConverter.convertXML(AnnotationConverter.java:214)
at ..... occurs. Need to handle this!