LT-273: Increased font weight for "loading" text, DICOM tag overlays, worklist results

Packages/viewerbase/client/components/viewer/loadingIndicator/loadingIndicator.styl

@@ -32,5 +32,5 @@
     top: 40%
     width: 100%
     font-size: 30px
-    font-weight: 200
+    font-weight: 300
     text-align: center

Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.styl

@@ -7,7 +7,7 @@ $viewportTagPadding = 20px
 
   .dicomTag
     position: absolute
-    font-weight: 200
+    font-weight: 400
 
   .topleft
     top: $viewportTagPadding