Fix attribute subscription for synoptic view

Description

• Change the device limit to 200
• Move the data subscription from svg component to synoptic display to avoid duplicate subscription with the svg widget.
• update ValidateSVG to ignore the syntax error that "" is not a valid json

Motivation

Background on use case, changes needed

Fixes:

• Items added

Changes:

• changes made

Tests included/Docs Updated?

• Included for each change/fix?
• Passing? (Merge will not be approved unless this is checked)
• Docs updated?
• New packages used/requires npm install?
• Toggle added for new features?