make the quit confirmation dialog match the current style

pd/nw/css/c64.css

@@ -386,6 +386,15 @@ text {
     left: 0;
 }
 
+/* Dialog to ask to save the patch before quitting */
+#save_before_quit {
+    color: white;
+    background-color: #3e32a2;
+    border:3px solid #cc9933;
+    padding: 12px;
+    margin: 12px;
+}
+
 /* Search dialog */
 
 .search_body {

pd/nw/css/inverted.css

@@ -399,6 +399,15 @@ text {
     left: 0;
 }
 
+/* Dialog to ask to save the patch before quitting */
+#save_before_quit {
+    color: #f3f3f3;
+    background-color: #222;
+    border:1px solid #eee;
+    padding: 12px;
+    margin: 12px;
+}
+
 #canvas_find_text {
     background: black;
     border-style: solid;

pd/nw/css/solarized_inverted.css

@@ -395,11 +395,11 @@ text {
 
 /* Dialog to ask to save the patch before quitting */
 #save_before_quit {
-    background-color: #fdf6e3;
-    border:1px solid #eee8d5;
+    color: white;
+    background-color: #002b36;
+    border:1px solid #839496;
     padding: 12px;
     margin: 12px;
-    box-shadow: 7px 7px 5px grey;
 }
 
 /* Search dialog */

pd/nw/css/subdued.css

@@ -383,6 +383,15 @@ text {
     left: 0;
 }
 
+/* Dialog to ask to save the patch before quitting */
+#save_before_quit {
+    background-color: #c0dcc0;
+    border:1px solid black;
+    padding: 12px;
+    margin: 12px;
+    box-shadow: 7px 7px 5px grey;
+}
+
 /* Search dialog */
 
 .search_body {

pd/nw/css/vanilla_inverted.css

@@ -388,6 +388,13 @@ text {
     left: 0;
 }
 
+/* Dialog to ask to save the patch before quitting */
+#save_before_quit {
+    color: white;
+    background-color: black;
+    border:1px solid white;
+}
+
 /* Search dialog */
 
 .search_body {