[js/widgets] fix the InOut widget with modern jQuery versions Several things are done there: * reduction in size and complexity of the code * the unused defaultsettings are removed * the initial `unlinked` list is now correctly populated from python-side * the unit test is adjusted because it tested an irrelevant implementation detail which is no longer true (but the widget of course still handles correctly the linkto information) Tested with ie7, ie9, chromium, firefox. Tested with jQuery 1.6 (cw 3.17.x) and 1.10. Closes #3154531.

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sync_schema_props_perms('CWSourceHostConfig', syncperms=False)

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sql('INSERT INTO cw_source_relation(eid_from, eid_to) '

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    'SELECT e.eid,s.cw_eid FROM entities as e, cw_CWSource as s '

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    'WHERE s.cw_name=e.source AND NOT EXISTS(SELECT 1 FROM cw_source_relation WHERE eid_from=e.eid AND eid_to=s.cw_eid)')

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commit()