work towards save/retrieve Dates & Stations; separated combobox fns
get cbxGetPanel key
retrieve and display Panel of NDVI values
'FillNDVISetupPanelFromCalcDict' fn now correctly empties controls for corresponding dictionary items that are None
reach over to DatesList in other panel, get first selection
test of getting list selection text
generalized fn 'getListCtrlSelectionsAsTextList'