Fix 13 compatibility issues

Signed-off-by: Julius Härtl <jus@bitgrid.net>

css/comp-13.scss

@@ -35,4 +35,15 @@ body:not(.snapjs-left) {
 			display: none;
 		}
 	}
-}
+}
+
+#commentsTabView .newCommentForm .message {
+	width: 100%;
+	margin-left: 0;
+	padding-right: 0;
+	display: block;
+}
+
+#commentsTabView .comment {
+	margin-bottom: 0;
+}

css/style.scss

@@ -967,6 +967,7 @@ input.input-inline {
 }
 .activitysubject .app-popover-menu-utils {
 	display: inline-block;
+	position: relative;
 	a {
 		font-weight: normal;
 	}