[Frontend] Time controller-related styling

open #1515
open #117
Markup changed to utilize mct-representation via CSS;
time-controller now uses list-based _constants values;
ConductorRepresenter.js modded to remove inline styling
and to add CSS classes to enclosing mct-representation;

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

@@ -45,6 +45,7 @@ $ueEditToolBarH: 25px;
 $ueBrowseLeftPaneW: 25%;
 $ueEditLeftPaneW: 75%;
 $treeSearchInputBarH: 25px;
+$ueTimeControlH: (33px, 20px, 20px);
 // Overlay
 $ovrTopBarH: 60px;
 $ovrFooterH: 30px;