#18 Import field mappings don't stick

[Rob Terrell]

1. Select "File -> Import -> CSV File..."
2. Select a valid file
3. When the field mappings appear, you can only change the first
field's mapping. The others "spring" back to their original value.
(Unless you select "Do not import" -- that seems to stick.)

This makes the feature essentially useless, unless you change your
data's column order in Excel first.

[Scott Ahten]

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Actually, this isn't a bug, but an attempt by the developer to prevent
you from mapping a import column to more than one schema column.
If a import column it's already mapped to another schema column, it
shows up in the pulldown, but wont stick"

The workaround is to make sure the column you want to change to
isn't mapped to any other column, then select it from the pulldown.

This seems to be a limitation of the software since I really might want
to map a input column to more than one schema column. Perhaps the
import implementation is developed in such a way that mapping a
input column to more than one schema column causes the import to
break.

In my opinion, the column should be removed from the pulldown if it is
already mapped or, if the implementation supports is, allow multiple
mappings.