Implement a "update build" function

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• I've checked for duplicate issues by using the search function of the issue tracker

Is your feature request related to a problem?

One of the things I use PoB for is to check my current builds. For this purpose, I regularly import these builds into PoB via the existing function "Import/Export Build" and there via the area "Character Import". However, this import often (or every time) changes the "Main Skill" and settings which skills can be added to "Full DPS".

Describe the solution you'd like

As a user, I would like a button that directly updates the current build without a selection dialog. As an option, this function should allow or disallow changes to the current settings for Main Skill, Configuration and Full DPS.

Describe alternatives you've considered

No response

Additional context

A suggestion would be to put this button as "Re-import" next to the two buttons "Save" and "Save As".

Start by tracing the existing Import/Export Build flow, especially Character Import, and the Save and Save As controls mentioned in the issue. Define how a Re-import button should update the current build and whether Main Skill, Configuration, and Full DPS settings are preserved or replaced; done means the behavior works without a selection dialog.