'Open file with calibration from another file' dialogue windows are flipped

[J.D. Laurence-Chasen]

When you click ‘open .xma trial file with calibration from another xma-file’ from the start screen, the first dialogue asks you to select the calibration, and the second asks you for the file with the trials. However, the function actually uses the trials from the first file selected and the calibration from the second.

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[Benjamin Knörlein]

fixes #243 : flipped trial and calibration for 'Open file with calibration from another file'

→ <<cset f6c1e29c95f4>>