AEM DAM Asset Collection limit on multiple workflow launch

Problem:

When we run the workflow on a collection of assets in AEM DAM, we get the following error:

Maximum number of assets that can be selected for multiple workflow launch is : 15. You have selected 28 assets across your selection(s). Please reduce the selected count accordingly.

Solution:

Add the following file to the repo:

ui.apps/src/main/content/jcr_root/apps/dam/gui/content/collections/.content.xml

The content of the file should be:

<?xml version="1.0" encoding="UTF-8"?>
<jcr:root xmlns:granite="http://www.adobe.com/jcr/granite/1.0" xmlns:cq="http://www.day.com/jcr/cq/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0" xmlns:nt="http://www.jcp.org/jcr/nt/1.0"
    jcr:primaryType="cq:Page">
    <jcr:content jcr:primaryType="nt:unstructured">
        <rails jcr:primaryType="nt:unstructured">
            <timeline jcr:primaryType="nt:unstructured">
                <granite:data
                    jcr:primaryType="nt:unstructured"
                    multipleWorkflowLimit="{Long}100"/>
            </timeline>
        </rails>
    </jcr:content>
</jcr:root>

The above change will increase the limit from 15 to 100.