Fix for 43421, add a style rule to use the selection color when a folder is hovered over during drags. r=ben.

git-svn-id: svn://10.0.0.236/trunk@76337 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/themes/classic/global/mac/tree.css

@@ -38,6 +38,10 @@ treeitem[selected="true"] > treerow {
 	color: #000000;
 	background-color: Highlight;
 }
+treeitem[dd-dropon="true"] > treerow { 
+	color: #000000;
+	background-color: Highlight;
+}
 
 treecell { 
   white-space: nowrap;

mozilla/themes/classic/global/unix/tree.css

@@ -25,6 +25,10 @@ treeitem[selected="true"] > treerow {
 	color: highlighttext;
 	background-color: highlight;
 }
+treeitem[dd-dropon="true"] > treerow { 
+	color: highlighttext;
+	background-color: highlight;
+}
 
 treecell 
   { 

mozilla/themes/classic/global/win/tree.css

@@ -33,6 +33,10 @@ treeitem[selected="true"] > treerow {
 	color: highlighttext;
 	background-color: highlight;
 }
+treeitem[dd-dropon="true"] > treerow { 
+	color: highlighttext;
+	background-color: highlight;
+}
 
 treecell 
   { 

mozilla/themes/modern/global/tree.css

@@ -27,6 +27,10 @@ treeitem[selected="true"] > treerow {
 	color: white;
 	background-color: #336699;
 }
+treeitem[dd-dropon="true"] > treerow { 
+	color: white;
+	background-color: #336699;
+}
 
 treecell { 
   white-space: nowrap;