ez: import parameters does not update projections directory

[tfarago]

If I do not press enter on the respective text field the output says DEBUG: ['darks', 'flats', 'tomo', 'flats2'], even though in the text field there is radios. @sgasilov you always have projections in tomo, so that's why you haven't seen this probably. Could you please fix this? Thanks a lot.

[sgasilov]

I did test it in the past and there are EdtitingFinished signals for every Entry after conversion to Py3. Apparently on your system all signals do not go through and consequently params are not all set before start_reconstruction function is called. I added explicit call to directory setters and inserted 100 msec delay to make sure all signals in other groupboxes have time to work before reco begins.