GF-60073: Additional fixes to handle spotlight issues with list re-generation

Only do reflow() at panel post transition (resized of all child contents is unnecessary).  Add unspot/respot logic to DataList refresh, similar to modelsAdded/Removed, to ensure spotlight stays within the list when refreshing/resizing/

DCO-1.1-Signed-Off-By: Kevin Schaaf <kevin.schaaf@lge.com>