reopen the next mission text in the same directory
error dialog when opening a translated mission text in the editor
4 more exercises to scala (+cosmetics and forgotten scala entities)
try to open a file of the project by default so that the lastSelectedPath is correctly filed
convert the methods.basics exercises
add new exercises on drawing, but without the color as we don't have methods parameters at this point of the learning process
display the backtrace to the user when its code raises an exception
convert MethodsReturning to scala too
ignore more of the cruft laying on my disk
refresh this figure so that it's readable