@navbar-default-link-active-bg not used in Theme gradients

Created by: code-decipher

Problem: When the value of @navbar-default-link-active-bg is modified in Customizer, the output CSS in bootstrap-theme.css and bootstrap-theme.min.css is incorrect.

Expected: Gradient should be applied to the color specified as @navbar-default-link-active-bg

Steps to Reproduce

1. Open Bootstrap Customizer
2. Change the value of @navbar-default-link-active-bg to # 003366
3. Click Compile and Download
4. Open bootstrap-theme.css

Actual:

.navbar-default .navbar-nav > .active > a {
  background-image: -webkit-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%);
  background-image: -o-linear-gradient(top, **#ebebeb** 0%, #f3f3f3 100%);
  background-image: linear-gradient(to bottom, #ebebeb 0%, #f3f3f3 100%);

Expected:

.navbar-default .navbar-nav > .active > a {
  background-image: -webkit-linear-gradient(top, #036 0, #001429 100%);
  background-image: -o-linear-gradient(top, #036 0, #001429 100%);
  background-image: linear-gradient(to bottom, #036 0, #001429 100%);