Reevaluate screen domains on refresh

See https://discuss.tryton.org/t/dont-understand/114

Screen domains depending on the Date / DateTime PYSON expressions are not
re-evaluated on search refresh. The only way to force a refresh it so close
the tab and re-open it.

This make it rather useless in some cases, especially for DateTime, since the
search results may change every second.

So I would like to store the screen domain / tab_domain as their original
expression, and evaluate it before each use.

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