Rohitt Vashishtha 96638f5bd4 dropdown-list-widget: Use null-value when no value is specified. ...

Previously, we tried to read the value from page_params, which was just
a hack to make the calling code look cleaner. We now remove that hack
and thus, our dependency on page_params existing. Now, if the caller
does not specify a default value, we'll use the null-value.

This also creates a new init() function to cleanly wrap the code that
makes changes to the opts passed to the widget.

2020-05-19 15:13:28 -07:00

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