New collapse and expand images, and css fixes for upshrink and My Messages, thanks to Arg

Signed-off-by: Bryan Deakin <runic@simplemachines.org>

Themes/default/css/index.css

@@ -1506,21 +1506,9 @@ ul li.greeting {
 	padding: 0 0 0 4px;
 }
 /* The upshrink image needs some tweaking */
-#upshrink {
+#upshrink, #upshrink:hover {
 	padding: 5px 4px 3px 4px;
-	border-radius: 4px;
-	background: #fff;
-	box-shadow: -1px -1px 3px rgba(96,134,166,0.1) inset;
-	border: 1px solid #ccc;
-	border-right: 1px solid #c4c4c4;
-	border-bottom: 1px solid #bbb;
-}
-#upshrink:hover{
-	background: #fafafa;
-	box-shadow: 0 1px 2px rgba(0,0,0,0.1) inset;
-	border: 1px solid #ccc;
-	border-left: 1px solid #bbb;
-	border-top: 1px solid #aaa;
+	background: #none;
 }
 
 /* The navigation list (i.e. linktree) */
@@ -2048,10 +2036,12 @@ div#pollmoderation {
 	margin: 4px 0 0 0;
 }
 /* poster and postarea + moderation area underneath */
-#forumposts .windowbg, #forumposts .windowbg2, #forumposts .approvebg,
-#forumposts .approvebg2, #personal_messages div.windowbg, #personal_messages div.windowbg2 {
+#forumposts .windowbg, #forumposts .windowbg2, #forumposts .approvebg, #forumposts .approvebg2 {
 	overflow: visible;
 }
+#personal_messages div.windowbg2 {
+	overflow: auto;
+}
 .post_wrapper:after {
 	content:"";
 	display: block;