fix: require data for brand app name form to be sent scidsg#573

For Roadmap Item scidsg#533

hushline/templates/settings.html

@@ -520,6 +520,7 @@ <h3>App Name</h3>
           name="brand_app_name"
           id="brand-app-name"
           value="{{ host_org.brand_app_name }}"
+          required
         />
         <button type="submit" class="btn">Update Name</button>
       </form>