fix(SR): When loading DICOM SR, only one measurement is shown with no way to show others (#3228)

* fix: Make the cornerstone sR viewport show all measurements

* PR fixes

* PR fixes

* Add a DICOM SR hanging protocol

* Duplicate the hanging protocol for seg as well

* PR requested change

* PR requested changes

* PR fixes plus merge update fixes

* PR fixes and integration test fix

* PR - documentation

extensions/cornerstone-dicom-sr/src/onModeEnter.js

@@ -4,7 +4,7 @@ export default function onModeEnter({ servicesManager }) {
   const { displaySetService } = servicesManager.services;
   const displaySetCache = displaySetService.getDisplaySetCache();
 
-  const srDisplaySets = displaySetCache.filter(
+  const srDisplaySets = [...displaySetCache.values()].filter(
     ds => ds.SOPClassHandlerId === SOPClassHandlerId
   );