Short Description: Supply and Transfer Item end-point updating flicker fix.
Bug Number: n/a
Release notes (y/n): no
For Release Nums: 6.1

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QtUtils/SupplyGfxItem.cpp
QtUtils/TransferGfxItem.cpp
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During certain transitions, e.g. when turning on or off a Supply Display
Group which has Account Aggregation turned on, Supply and Transfer Items 
receive updates when one or both of the linked AccountGfxItems have local
position coordinates of ZERO.

When that happens, we'll skip the update.  A subsequent end-point update
will be received after both AccountGfxItems' coordinates have been 
corrently defined.

See this method in both classes: updateEndPoints();

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