QRame 1.26 : right click measurement name to update, distribution with violin/nb of transects, add selected measurement on discharge graph, fix bugs from pickles save with external import, compute cochran for external import measurement

[Not completed yet] Fix many bugs from results import, fix Measurements2Use with results import, fix graphs, proper matching import

Remove test, add LOWESS correction for intercomparison, optimize LoadMeasurements.py to stock measurements_dict and call thread when needed, save initial NavRef