Configurable default column selection in Task Inbox

The customer is looking for a way to customize the column selection of the default Task Inbox, without having to select an advanced filter first. The selected columns need to include fields defined as task variables.

Use case:
The customer has created an application where the entry point for the business users is the Task Inbox. Each user will only see the task for a specific task (eg. Approval task) from a specific process definition. In order to decide which task to work on, the user needs to see all business related information (stored as task variables) in the Task Inbox.

Attached is a screen shot showing how the customized Task Inbox currently looks like, including the custom fields in the columns. To get there, the user has to click on the advanced filter first. However, this is considered unpractical.

The lack of this functionality is preventing the customer to roll out this application based on RHPAM 7 internally.