Merge pull request #427 from sharelatex/pr-blank-screen-large-comments

Avoid blank screen bug, when triggered by very large comments.

services/web/public/stylesheets/app/editor/review-panel.less

@@ -158,6 +158,8 @@
 		position: absolute;
 		top: 0;
 		bottom: 0;
+		padding-bottom: 52px;
+		overflow: hidden;
 	}
 	
 	.rp-state-overview & {
@@ -461,6 +463,7 @@
 		margin-top: 3px;
 		overflow-x: hidden;
 		min-height: 3em;
+		max-height: 400px;
 	}
 
 .rp-icon-delete {