Adjusted styles due to upstream SCSS changes in Boost.

CHANGES.md

@@ -6,6 +6,7 @@ Changes
 
 ### Unreleased
 
+* 2019-01-31 - Adjusted styles due to upstream SCSS changes in Boost.
 * 2019-01-30 - Adjusted config.php due to upstream changes in theme Boost.
 * 2019-01-29 - Adjusted styles for the footnote due to upstream changes in Boost.
 * 2019-01-28 - Adjusted styles for the imagearea due to upstream changes in Boost.

scss/post.scss

@@ -10,15 +10,19 @@
     @if $breakpoint == 'yes' {
         #region-main-settings-menu.has-blocks,
         #region-main.has-blocks {
+            display: inline-block;
             width: calc(100% - #{$blocks-plus-gutter});
             @include media-breakpoint-down(md) {
                 width: 100%;
+                /* MDL-63102 - Remove extra space at bottom.
+                If modifying make sure block-region is horizontally stacked when in full screen */
+                display: block;
             }
         }
     }
 }
 [data-region="blocks-column"] {
-    width: 250px;
+    width: $blocks-column-width;
     @include media-breakpoint-down(md) {
         width: 100%;
     }