Spinner: Inherit font color since we inherit background color. Fixes #8950 - Spinner: value can't be seen in dark themes.

Author: scottgonzalez

themes/base/jquery.ui.spinner.css

@@ -18,6 +18,7 @@
 .ui-spinner-input {
 	border: none;
 	background: none;
+	color: inherit;
 	padding: 0;
 	margin: .2em 0;
 	vertical-align: middle;