Js error table fix

[jakublamprecht]

Now proper information about no JS Errors is displayed instead of empty table

Description

Changed conditions so that appropriate message is shown to the user depending on whether there were JS Errors or not

Motivation and Context

Displaying empty table can be confusing to users

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

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