Changes
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==== GUID Properties ====
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For performance/usability reasons, the result list is not immediately refreshed as one types in the text box. Instead, it only happens after the ReloadChildListCommand is triggered.
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By default, the expression used for filtering is Content["PROPERTY_NAME"].DisplayValue.ToLower().Contains(FILTER_VALUE.ToLower())==true.
In other words, it checks whether the specified filter value (as string) is contained in the display value of the property.
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== UI Customizing ==
