ENH: changed checkboxes with row selection for downloading sereis
Merge pull request #23 from QIICR/12-download-in-background

ENH: changed checkboxes with row selection for downloading sereis
ENH: clear selections after pressing download. If it is not cleared pressing download button multiple time will start several unwanted download requests
Merge pull request #24 from QIICR/12-download-in-background

ENH: clear selections after pressing download. If it is not cleared pres...
BUG: Fix the bug which removed the multiple selection
Merge pull request #25 from QIICR/12-download-in-background

BUG: Fix the bug which removed the multiple selection