One of the things that has been hightlighted by dev/Financial#120 is that since this commit https://github.com/civicrm/civicrm-core/commit/1143a7815b1abbcb7cfc0cab6c754e499d11d064#diff-ff63186dcddd8213d6b992efd57d70a4 from @totten not all resources urls are treated the same. What that causes is that all bower_components and packages urls now are relative to the CiviCRM Core root path as calculated by getCiviSourceStorage rather than the CiviCRM Core Resources URL setting. Where as assets loaded from the root folder e.g. js/common.js etc would all still continue to respect the setting. This ticket is about unifying them back together in a way that is sensible. Or at least we should update the documentation and other respects to indicate that the setting no longer applies to packages and bower_components urls