fix(ViewportOrientationMarkers): round rotation to fix floating point issue (#5135)

Co-authored-by: Joe Boccanfuso <109477394+jbocce@users.noreply.github.com>

extensions/cornerstone/src/Viewport/Overlays/ViewportOrientationMarkers.tsx

@@ -198,6 +198,9 @@ function _getOrientationMarkers(rowCosines, columnCosines, rotation, flipVertica
   const oppositeRowString = invertOrientationStringLPS(rowString);
   const oppositeColumnString = invertOrientationStringLPS(columnString);
 
+  // Round to 4 decimal places (after rotate right 3 times and flip horizontally -> rotation is 90.00000000000001)
+  rotation = Math.round(rotation * 10000) / 10000;
+
   const markers = {
     top: oppositeColumnString,
     left: oppositeRowString,