Fixing issue alert indexer is not shown after upload
1. Scatter plot code is improved.
2. Added constraints to the scatter plot. Scatter plot can only be used
with continuous data.
3. Adding the ability to remember the users selection in the charts
designers.
Fixing some code regarding to making multiple xy series
Adding validation to the chart designers forms
Merge pull request #1051 from jjettenn/master

Fixing issue alert indexer is not shown after upload and adding new functionality to the charts