Fix for bug 221619. Tree widget refactoring and enhancement. r=neil sr=bryner

suite/themes/classic/communicator/sidebar/sidebarListView.css

@@ -21,6 +21,7 @@
  *   Ben Goodger <ben@netscape.com>
  */
 
-treechildren {
+treechildren::-moz-tree-image,
+treechildren::-moz-tree-cell-text {
   cursor: pointer;  
 }

suite/themes/modern/global/tree.css

@@ -150,8 +150,10 @@ treechildren::-moz-tree-line(selected, focus) {
 /* ::::: tree separator ::::: */
 
 treechildren::-moz-tree-separator {
+  margin-top: 1px;
   border-top: 1px solid #7A8490;
   border-bottom: 1px solid #FEFEFE;
+  height: 2px;
 }
 
 /* ::::: drop feedback ::::: */
@@ -169,6 +171,16 @@ treechildren::-moz-tree-drop-feedback {
   margin-left: 5px;
 }
 
+/* ::::: tree checkbox ::::: */
+                                                                                
+treechildren::-moz-tree-checkbox {
+  list-style-image: url("chrome://global/skin/tree/checkbox.gif");
+}
+                                                                                
+treechildren::-moz-tree-checkbox(checked) {
+  list-style-image: url("chrome://global/skin/tree/checkbox-checked.gif");
+}
+
 /* ::::: tree progress meter ::::: */
 
 treechildren::-moz-tree-progressmeter {

suite/themes/modern/jar.mn

@@ -271,6 +271,8 @@ modern.jar:
   skin/modern/global/toolbar/tbgrip-arrow-clps-act.gif             (global/toolbar/tbgrip-arrow-clps-act.gif)
   skin/modern/global/toolbar/tb-mid.gif                            (global/toolbar/tb-mid.gif)
   skin/modern/global/toolbar/chevron.gif                           (global/toolbar/chevron.gif)
+  skin/modern/global/tree/checkbox.gif                             (global/tree/checkbox.gif)
+  skin/modern/global/tree/checkbox-checked.gif                     (global/tree/checkbox-checked.gif)
   skin/modern/global/tree/sort-asc.gif                             (global/tree/sort-asc.gif)
   skin/modern/global/tree/sort-dsc.gif                             (global/tree/sort-dsc.gif)
   skin/modern/global/tree/twisty-clsd.gif                          (global/tree/twisty-clsd.gif)