Merge pull request #1037 from jitsi/add-specific-read-only-color

Add specific color for read-only input

css/input-control/_input-control.scss

         position: absolute;
         right: 0;
     }
+}
+
+/**
+ * Set a specific color for read only style.
+ */
+input:read-only {
+    color: $readOnlyInputColor;
 }

css/themes/_light.scss

 $inputBorderColor: #ccc;
 $inputColor: #333;
 $placeHolderColor: #a7a7a7;
+$readOnlyInputColor: #a7a7a7;
 $defaultDarkSelectionColor: #ccc;
 $buttonFontWeight: 400;
 $labelFontWeight: 400;