Make spacing at top/bottom of last seen indicator consistent

Sadly, that spacing now needs to be bigger because scrollIntoView
doesn't honor margins which overlap each other to eliminate this kind of
'too much spacing' kind of problem.

FREEBIE

stylesheets/_conversation.scss

@@ -696,9 +696,12 @@ li.entry .error-icon-container {
 }
 
 .message-list .last-seen-indicator-view {
-  // We need this extra layer of DOM nodes because scrollIntoView() doesn't honor margins
-  padding-bottom: 2em;
-  padding-top: 2em;
+  // This padding is large so we clear the avatar circle extending into the conversation
+  // window.scrollIntoView() doesn't honor margins, so we're using padding
+  // padding-top is less to account for the 10px margin at the bottom of messages
+  padding-top: 25px;
+  padding-bottom: 35px;
+
 
   .bar {
     display: flex;