Merge pull request #11 from bytekast/PDI-9314

[PDI-9314] Make receiving value from External Input Prompt async
[ANALYZER-1660] Visualizations need to handle negative Measure values consistently when used as size by and color by values.
ColorByNegativesMode option was moved from the properties panel to the chart options dialog, "Other" tab.
Merge pull request #12 from webdetails/master

[ANALYZER-1660] Visualizations need to handle negative Measure values consistently when used as size by and color by values.
[PDI-9314] Pass existing value to ExternalInput prompt callback