Files don't get renamed according to content-disposition
Some files don't always get renamed when downloaded with CSTP.
1. Open https://stepic.org/lesson/Ultrametric-Evolutionary-Trees-10332/step/8?course=Bioinformatics-Algorithms-(Part-2)&unit=2064
2. Download the sample dataset.
3. See it saved with the name file instead of dataset-blah.
Correct file name.
Incorrect file name.
Built with Qt 5.4.0, running with Qt 5.4.0
Running on: Gentoo/Linux x86_64 3.16.0-pf1 #1 SMP PREEMPT Thu Aug 28 21:55:11 MSK 2014