Fix zoom scaling
Fix zoom scaling

The GraphingCalculator.zoom `startBase` wants the row start base on the
overall `startBase`. We had the order of dict merging backwards to
provide that.

re #863 (0.25)

NProfileAnalysisComputationalTool/npact,NProfileAnalysisComputationalTool/npact,victor-lin/npact,NProfileAnalysisComputationalTool/npact,NProfileAnalysisComputationalTool/npact,NProfileAnalysisComputationalTool/npact,victor-lin/npact,victor-lin/npact,victor-lin/npact,victor-lin/npact