fix: update DICOMSR and Measurement Panel copy to use L/W (#2174)

* fix: update DICOMSR and Measurement Panel copy to use L/W

* functional viewport

* support the active viewport for snapshot

* Support empty viewport case

* bump cs-tools to pick up misc. fixes

extensions/measurement-tracking/package.json

@@ -28,7 +28,7 @@
   },
   "peerDependencies": {
     "@ohif/core": "^0.50.0",
-    "cornerstone-tools": "4.20.1",
+    "cornerstone-tools": "5.1.2",
     "dcmjs": "0.16.1",
     "prop-types": "^15.6.2",
     "react": "^16.13.1",