[Common UI] Get split pane width from elements

WTD-1363.

platform/commonUI/browse/res/templates/browse.html

@@ -22,11 +22,9 @@
 <div content="jquery-wrapper" class="abs holder-all browse-mode">
     <mct-include key="'topbar-browse'"></mct-include>
     <div class="holder browse-area s-browse-area abs" ng-controller="BrowseController">
-        <mct-split-pane class='split-layout vertical contents abs'
-                        anchor='left'
-                        initial="25%">
+        <mct-split-pane class='contents abs' anchor='left'>
             <div class='split-pane-component treeview pane'
-                 style="min-width: 150px; max-width: 800px;">
+                 style="min-width: 150px; max-width: 800px; width: 25%;">
                 <mct-representation key="'create-button'" mct-object="navigatedObject">
                 </mct-representation>
                 <div class='holder tree-holder abs'>