Ui improvements (#6198)

* PLT-6306 - Post alignment in compact view

* PLT-6266 - Adjusting spacing for files (compact)

* PLT-6302 - Margins not equal for paragraphs in post

* PLT-6332 - FIxing inline images

* PLT-6134 - Fixing border on emoji picker

* PLT-6323 - Fixing UI for system console user list

* PLT-6375 - Updating emoji picker

* PLT-6327 - Updating more channel/user list

* PLT-6241 - Adding IE detection

* PLT-6332- Fixing inline markdown images

webapp/sass/layout/_markdown.scss

@@ -19,8 +19,9 @@
 #post-list {
     .markdown-inline-img {
         -moz-force-broken-image-icon: 1;
-        height: 500px;
+        margin: 5px 0;
         max-height: 500px;
+        max-width: 500px;
     }
 }
 
@@ -67,7 +68,7 @@
     padding: 4px 10px 5px;
     position: absolute;
     right: 0;
-    top: 5;
+    top: 5px;
     z-index: 5;
 }