Ui improvements (#6089)

* PLT-6084 - Fixing emoji reaction overflow

* PLT-6158 - Fixing pinned badge alignment in RHS

* PLT-6306 - Post alignment in compact view

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

* PLT-6245 - Adjusting spacing in emoji screen modal

* PLT-6237 - Adjusting filter in system console

* PLT-6247 - Adjusting spacing on code block tag

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

webapp/sass/layout/_markdown.scss

@@ -64,19 +64,19 @@
     padding: 4px 10px 5px;
     position: absolute;
     right: 0;
-    top: 0;
+    top: 5;
     z-index: 5;
 }
 
 .post-code__lineno {
+    -moz-user-select: none;
+    -ms-user-select: none;
+    -o-user-select: none;
+    -webkit-user-select: none;
     border-right: 1px solid #aaa;
     color: #aaa;
     margin-right: .5em;
     text-align: right;
-    -webkit-user-select: none;
-    -moz-user-select: none;
-    -ms-user-select: none;
-    -o-user-select: none;
     user-select: none;
 }