Close map2loop dialogs after successful runs

[Copilot]

Map2loop tools now behave as dialogs that close only after their actions succeed, preventing lingering windows after failures.

• Dialog lifecycle: All map2loop dialogs (sampler, sorter, user sorter, basal contacts, thickness calculator, paint strat order) now call accept() only when the embedded widget reports success.
• Success signaling: Each underlying widget returns a boolean indicating whether execution succeeded, enabling dialogs to decide when to close.
• Fault topology: Returns success status to align with the dialog pattern.

Example:

# Sampler dialog accept handler
def _run_and_accept(self):
    if self.widget._run_sampler():
        self.accept()

Original prompt

Ensure that every map2loop widget/tool acts as a dialog widget that is closed once the tool has been run.

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