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By default, Dataset Types is a selectable combo box
By default, radio button for Hapmap format is selected
If User selects a Dataset type in the combo box
and User then selects Sample/Marker Metadata as the format
a System Message popup tells the user “you cannot select dataset type for extract metadata only”
user must close the popup (seelct x in the upper right corner) before able to continue (same as how the popup works when submitting a job)
Data types combo box shows ‘Select a Dataset Type’ greyed out and unselectable (no longer displaying the dataset type previously selected)
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