HappyTools tries to quantify all files in the chose batchfolder during batchprocess

Describe the bug HappyTools will attempt to quantify all files of the allowed filetypes in the folder selected as 'Batch Directory' during batch process, which includes files that are not chromatograms such as the LICENSE.txt file.

To Reproduce Steps to reproduce the behavior:

Copy the example data and files to the base HappyTools directory.
Run HappyTools.
Select Batch Process
Select the calibration file in the HappyTools base directory
Select the HappyTools base directory as the 'Batch Directory'
Run

Expected behavior HappyTools should ignore non chromatogram files.

Screenshots

Desktop (please complete the following information):

Version 0.1-alpha
Build 181005b

Tarskin / HappyTools

HappyTools tries to quantify all files in the chose batchfolder during batchprocess #37