[Frontend] Fix for bad fix

Fixes #1112
Put overflow: hidden back at
outer wrapper level (now on .t-object.primary-pane
) which doens't clip the Inspector expand/collapse;
did better unit testing;

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

@@ -128,7 +128,7 @@
         line-height: $ueTopBarH;
     }
 
-    .primary-pane {
+    .t-object.primary-pane {
         // Need to lift up this pane to ensure that 'collapsed' panes don't block user interactions
         z-index: 4;
     }
@@ -212,6 +212,8 @@ body.desktop .pane .mini-tab-icon.toggle-pane {
         .holder-object {
             top: $bodyMargin;
             bottom: $interiorMargin;
+            // Clip element that have min-widths
+            overflow: hidden;
         }
         .holder-inspector {
             top: $bodyMargin;

platform/features/conductor-v2/conductor/res/sass/_time-conductor-base.scss

@@ -28,8 +28,7 @@
 
 .l-time-conductor-holder {
     border-top: 1px solid $colorInteriorBorder;
-    // Clip if Time Conductor min-width is exceeded
-    overflow: hidden;
+    min-width: 500px;
     padding-top: $interiorMargin;
 }
 
@@ -97,8 +96,6 @@
     $r1H: nth($ueTimeConductorH, 1);
     $r2H: nth($ueTimeConductorH, 2);
     $r3H: nth($ueTimeConductorH, 3);
-
-    min-width: 500px;
     position: relative;
 
     > .l-row-elem {