Revamps the import options on the tools menu to have two parts:
[1] Staging (load file into reservoir)
[2] Managing (review the list of staged batches, then
choose to commit or undo a given batch.
Signed-off-by: Chris Cormack <crc@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>