- update: Bootstrap version to v4.0.0-beta.2

- update: vue-chartjs version to 3.0.0
- refactor: Remove old SCSS variables
- refactor: Breadcrumb Menu styles
- fix: External links issue
- fix: Mobile sidebar-nav height issue

Vue_Starter/scss/bootstrap/utilities/_background.scss

@@ -1,6 +1,19 @@
+// stylelint-disable declaration-no-important
+
 @each $color, $value in $theme-colors {
-  @include bg-variant('.bg-#{$color}', $value);
+  @include bg-variant(".bg-#{$color}", $value);
 }
 
-.bg-white { background-color: $white !important; }
-.bg-transparent { background-color: transparent !important; }
+@if $enable-gradients {
+  @each $color, $value in $theme-colors {
+    @include bg-gradient-variant(".bg-gradient-#{$color}", $value);
+  }
+}
+
+.bg-white {
+  background-color: $white !important;
+}
+
+.bg-transparent {
+  background-color: transparent !important;
+}