[Frontend] Adds overflow scrolling to .l-view-section (#2039)

Fixes #1878
- Add overflow: auto;
- Better naming of $overflow arg;
- Fixed and unit tested in plots and tables;

platform/commonUI/general/res/sass/_views.scss

@@ -5,8 +5,7 @@
 }
 
 .l-view-section {
-    //@include test(orange, 0.1);
-	@include absPosDefault(0);
+	@include absPosDefault($overflow: auto);
 	h2 {
 		color: #fff;
 		margin-bottom: $interiorMargin;