Enhancement: Fixes #4, implement GtkComboBox styles

themes/luna/blue/gtk-3.0/controls/combobox.scss

@@ -0,0 +1,49 @@
+/**
+ * combobox.scss - Combobox Widget Luna (Blue) Styles
+ *
+ * This source-code is part of Windows XP stuff for XFCE:
+ * <<https://www.oddmatics.uk>>
+ *
+ * Author(s): Rory Fewell <roryf@oddmatics.uk>
+ */
+
+combobox
+{
+    background-color: #FFF;
+    border: 1px solid #7F9DB9;
+    
+    
+    button
+    {
+        background-image: url("../Resources/combobox_button.png");
+        background-position: right;
+        background-repeat: no-repeat;
+        background-size: contain;
+        border-width: 0px;
+        margin: 1px;
+        min-height: 18px;
+        min-width: 15px;
+        
+        
+        &:hover
+        {
+            background-image: url("../Resources/combobox_button_hover.png");
+        }
+        
+        &:active
+        {
+            background-image: url("../Resources/combobox_button_press.png");
+        }
+        
+        &:disabled
+        {
+            background-image: url("../Resources/combobox_button_inactive.png");
+        }
+    }
+    
+    entry
+    {
+        border-width: 0px;
+        padding-top: 2px;
+    }
+}

themes/luna/blue/gtk-3.0/main.scss

@@ -10,6 +10,7 @@
 @import "controls/_base";
 @import "controls/button";
 @import "controls/checkbox";
+@import "controls/combobox";
 @import "controls/entry";
 @import "controls/menu";
 @import "controls/menubar";