Fix related to the ICE-3393 (Eliminate unnecessary UIComponent.getChildren() calls)
All getFacets().get(key) calls replaced with getFacet(key).

Files:
modified: /icefaces/trunk/icefaces/component/src/com/icesoft/faces/component/tree/TreeNode.java (try)
modified: /icefaces/trunk/icefaces/component/src/com/icesoft/faces/component/ext/HtmlDataTable.java (try)
modified: /icefaces/trunk/icefaces/component/src/com/icesoft/faces/component/datapaginator/DataPaginator.java (try)
modified: /icefaces/trunk/icefaces/component/src/com/icesoft/faces/component/ext/UIColumns.java (try)