one2many - keep focus after commit on edited record

Registered by Ferdinand

currently the list of resources is refreshed and the cursor is positioned on NO record - the counter shows (_/xxx)
(some) users tend to commit their work from time to time and the focus should stay on the last record edited (as it does on a top level list/form)
Example project task work

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Not started
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Priority:
Undefined
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Direction:
Needs approval
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Definition:
New
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Implementation:
Unknown
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