Enable customizable Test List gadget columns, allowing users to add, remove, and reorder fields.

Description

Allow users to customize the columns displayed in the Test List gadget, similar to the "Columns to display" option available in the Test Runs List gadget.

User friction

Users cannot add, remove, or reorder columns in the Test List gadget, limiting visibility of important test information.

Steps to reproduce (right now) / Actual Result:

1. Open the Test List gadget.
2. Review the available display options.
3. Attempt to customize displayed columns.

Actual Result: No option is available to add, remove, or reorder columns.

IMPACT

Reduced flexibility when viewing Test data and difficulty exposing relevant information directly in the gadget.

What would improve if solved:

Users could tailor the Test List gadget to their needs and quickly access important test details without additional navigation.

Impact on stakeholders:

Test managers, QA engineers, and project stakeholders would gain better visibility and reporting capabilities.

Current workaround:

Use other views or gadgets, such as Test Runs List or Test Coverage, to access the required information.

CONTEXT & EXAMPLES:

The Test Runs List gadget already provides a "Columns to display" configuration where users can add, remove, and reorder fields. Similar functionality is requested for the Test List gadget.

Concrete example:

A user wants to display an additional column in the Test List gadget, similar to the column shown in the Test Coverage section of a Requirement issue, but currently cannot configure it.

Workaround risk:

Switching between multiple views or gadgets is less efficient and may lead to missed information or extra manual effort.