added detiq-t modifications (save as and zoom buttons to the image window and image contextual menu + add copy image function (issues with ctrl+c shortcut)) + fixed entropy calculation + fixed DPCM predictor inversion + added information to threshold dialog about moving second threshold

Fallback to system default

... and update Detiq-T submodule

Also update the lib to the last revision

This commit also update detiq-t submodule to the last commit