WIP: adjust default-dark theme

* btn-default

resource/styles/agile-admin/inverse/colors/_apply-colors-dark.scss

@@ -5,12 +5,23 @@
 }
 
 /*
-  * Code
-  */
+ * Code
+ */
 code {
   background-color: darken($bodycolor, 5%);
 }
 
+/*
+ * Button
+ */
+.btn-default {
+  &:hover, &:focus,
+  &.active, &.active:hover, &.active:focus {
+    color: white;
+    background-color: lighten($bodycolor, 5%);
+  }
+}
+
 /*
   * Form
   */
@@ -23,9 +34,6 @@ input.form-control, textarea.form-control {
   color: lighten($bodytext, 10%);
   background-color: lighten($bodycolor, 5%);
 }
-/*
- * Form
- */
 .input-group .input-group-addon {
   color: $dark;
   background-color: rgba($topbar, 0.4);