iFrame not reading global parameters, throwing error instead

[jbleakleycode]

• NeoDash version: 2.4.1 (tried locally and on neodash.graphapp.io)

• Neo4j Database version: 5.3.0 Enterprise

• Steps to reproduce: 1. Create a table that returns a link, create report action to set link to a global parameter. 2. Return global parameter in iFrame query.

• Expected behavior: iFrame report card has url destination embedded.

• Actual behavior: Error message "Invalid iFrame URL. Make sure your url starts with http:// or https://."

[nielsdejong]

Solved this one as part of the fix for #659.
Part of #744 - to be released with 2.4.2.