FIX: add global hidden overflow on all topic bodies

app/assets/stylesheets/common/base/discourse.scss

@@ -33,7 +33,6 @@ small {
 
 blockquote {
   @include post-aside;
-  overflow: hidden;
   clear: both;
 }
 

app/assets/stylesheets/common/base/topic-post.scss

@@ -152,6 +152,10 @@ aside.quote {
 }
 
 .topic-body {
+  // this is necessary for ANYTHING that extends past the right edge of
+  // the post body, such as an image in a deeply nested list, image in
+  // a deeply nested blockquote, and so on.. you get the idea.
+  overflow: hidden;
   &.highlighted {
     background-color: dark-light-diff($tertiary, $secondary, 85%, -65%);
   }

app/assets/stylesheets/desktop/topic-post.scss

@@ -706,6 +706,7 @@ $topic-avatar-width: 45px;
   border-top: 1px solid dark-light-diff($primary, $secondary, 90%, -75%);
   padding: 12px $topic-body-width-padding 15px $topic-body-width-padding;
 }
+
 .topic-avatar {
   border-top: 1px solid dark-light-diff($primary, $secondary, 90%, -75%);
   padding-top: 15px;

app/assets/stylesheets/embed.css.scss

@@ -28,7 +28,6 @@ article.post {
     margin: 0 0 10px 0;
     background-color: dark-light-diff($primary, $secondary, 97%, -45%);
     border-left: 5px solid darken(dark-light-diff($primary, $secondary, 97%, -45%), 10%);
-    overflow: hidden;
     p {
       margin: 0 0 10px 0;
     }