style save button as btn-primary

components/corrections.less

@@ -140,4 +140,11 @@ fieldset[disabled] input[type=submit], fieldset[disabled] input[type=button] {
   left:50%;
   right:unset;
   margin-left:-10em;
-}
\ No newline at end of file
+}
+
+/* style save button as btn-primary */
+#wpSave {
+	color: #fff;
+	background-color: #337ab7;
+	border-color: #2e6da4;
+}