[nice to have]. Let the user add an icon before the header groups when using the oj-list-view component https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=listView&demo=observableNestedArrayListView . The result should look like: <img width="161" alt="img" src="https://user-images.githubusercontent.com/81378415/177392040-49c27196-740c-4802-8cbe-23cb1a8f8a86.png">
[nice to have]. Let the user add an icon before the header groups when using the oj-list-view component https://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html?component=listView&demo=observableNestedArrayListView .
The result should look like: