Remove scoping from Rally Solr Artifact Chooser Dialog

I am using a rallysolrartifactchooserdialog to display an initiative picker. However, the initiatives that populate the grid are only within my default project scoping in Rally. Is there a way to configure this to fetch all initiatives?

{
        xtype: 'rallysolrartifactchooserdialog',
        id: 'portfolioItemPicker',
        artifactTypes: ['portfolioitem/initiative'],
        autoShow: true,
        height: 250,
        title: 'Choose an Initiative',
        listeners: {
            scope: this,
            artifactChosen: function(picker, selectedRecord) {
                ...
            }
        }
}

I did notice a storeConfig parameter in the documentation - perhaps this is the solution?

You're on the right track. You can control the scoping of the artifacts by including a context on the storeConfig:

storeConfig: {
    context: {
        //specify the workspace to search
        workspace: Rally.util.Ref.getRelativeUri(this.getContext().getWorkspace()),

        //all projects
        project: null
    }
}

By the way, if you are using 2.0rc3 the appropriate event is actually artifactchosen (all lowercase). I'll fix the doc example to reflect that...