[Frontend] Misc CSS updates to clean up layout

open #199
IN-PROGRESS
Testing with Time Controller visible;

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

@@ -125,7 +125,8 @@ mct-container {
     @include ellipsize();
 }
 
-.scrolling {
+.scrolling,
+.scroll {
 	overflow: auto;
 }
 

platform/commonUI/general/res/sass/controls/_time-controller.scss

@@ -6,10 +6,6 @@
 	}
 }
 
-.l-time-controller-visible {
-
-}
-
 mct-include.l-time-controller {
 	$minW: 500px;
 	$knobHOffset: 0px;

platform/commonUI/general/res/sass/user-environ/_layout.scss

@@ -221,16 +221,16 @@
 .object-holder {
     @include absPosDefault(0, auto);
     top: $ueTopBarH + $interiorMarginLg;
-    &.l-controls-visible {
-        &.l-time-controller-visible {
-            bottom: nth($ueTimeControlH,1) + nth($ueTimeControlH,2) +nth($ueTimeControlH,3) + ($interiorMargin * 3);
-        }
-    }
 }
 
 .l-object-wrapper {
     @extend .abs;
     top: $ueTopBarH + $interiorMarginLg;
+
+    .object-holder-main {
+        position: relative;
+    }
+
     &.active {
         @include pulseBorder($colorKey, 150ms, 8, 0.5s);
         @include border-radius($controlCr);