Make sticky sidebar live well with short content (#2514)

CHANGELOG.md

@@ -1,3 +1,9 @@
+## Unreleased
+
+### Enhancements
+
+- Make sticky sidebar live well with short content. [#2514](https://github.com/mmistakes/minimal-mistakes/pull/2514)
+
 ## [4.19.2](https://github.com/mmistakes/minimal-mistakes/releases/tag/4.19.2)
 
 ### Enhancements

_sass/minimal-mistakes/_sidebar.scss

@@ -32,7 +32,7 @@
       /* calculate height of nav list
          viewport height - nav height - masthead x-padding
       */
-      height: calc(100vh - #{$nav-height} - 2em);
+      max-height: calc(100vh - #{$nav-height} - 2em);
     }
   }
 

docs/_docs/18-history.md

@@ -5,10 +5,16 @@ permalink: /docs/history/
 excerpt: "Change log of enhancements and bug fixes made to the theme."
 sidebar:
   nav: docs
-last_modified_at: 2020-05-01T11:53:42-04:00
+last_modified_at: 2020-05-02T00:54:04+08:00
 toc: false
 ---
 
+## Unreleased
+
+### Enhancements
+
+- Make sticky sidebar live well with short content. [#2514](https://github.com/mmistakes/minimal-mistakes/pull/2514)
+
 ## [4.19.2](https://github.com/mmistakes/minimal-mistakes/releases/tag/4.19.2)
 
 ### Enhancements