@ArmstKP As Sarah pointed out we do have plans to enhance the configuration experience to let you modify the default text. We wanted to wait until we had a system in place to allow translation of those strings into multiple languages in place. We now have the ability to translate user defined strings in the app and will work on exposing these as configuration options later this year.
In the meantime there is a "hacky" way that you can change the text you asked about if all you want to do is change it for one language. Custom CSS can be used to hide the existing text and use a CSS pseudo element to add in new text.
Steps:
1. Configure your Sidebar App
2. Use the "Search settings" option to search the configuration for "Custom CSS" and click Edit
3. Paste the following CSS into the Custom CSS text area after replacing the "Your custom text goes here" with the text you'd prefer.
#popupPanel .esri-widget__content--empty:after {
content: "Your custom text goes here";
}
.esri-widget__heading{
display:none;}
