Fix bug in EffortImporter that did not auto-fill zeros for start column in import spreadsheet.
Fix bug in EffortImporter that did not auto-fill zeros for start column in import spreadsheet.

voltagead/OpenSplitTime,SplitTime/OpenSplitTime,voltagead/OpenSplitTime,SplitTime/OpenSplitTime,voltagead/OpenSplitTime,SplitTime/OpenSplitTime