Fixed font blur/flicker in history

Closes #1486

app/less/app.less

@@ -1539,8 +1539,9 @@ a.im_dialog_selected {
   margin-left: 0;
 }
 .im_message_author_admin {
-  color: #999;
+  color: #adadad;
   margin-left: 6px;
+  font-size: 11px;
 }
 
 .im_message_from_photo,
@@ -4064,6 +4065,7 @@ ul.chat_modal_migrate_list {
 
 .im_message_focus_active {
   .im_message_date,
+  .im_message_author_admin,
   .im_message_document_size,
   .audio_player_duration,
   .audio_player_size,

app/less/desktop.less

@@ -689,9 +689,11 @@ a.footer_link.active:active {
 
   &_scrollable_wrap {
     /* Hardware acceleration in Safari */
-    -webkit-transform: translateZ(0);
+    
-    -webkit-perspective: 1000;
+    // Caused flickering and bluring in webkit
-    -webkit-backface-visibility: hidden;
+    // -webkit-transform: translateZ(0);
+    // -webkit-perspective: 1000;
+    // -webkit-backface-visibility: hidden;
   }
 }
 
@@ -946,6 +948,7 @@ a.footer_link.active:active {
 .im_message_selected .im_message_audio_duration,
 .im_message_selected .im_message_audio_size,
 .im_message_selected .im_message_fwd_date,
+.im_message_selected .im_message_author_admin,
 .im_message_selected .im_message_views_cnt,
 .im_message_selected .im_message_sign_link,
 .im_history_select_active .im_message_outer_wrap:hover .im_message_date,
@@ -953,6 +956,7 @@ a.footer_link.active:active {
 .im_history_select_active .im_message_outer_wrap:hover .im_message_audio_duration,
 .im_history_select_active .im_message_outer_wrap:hover .im_message_audio_size,
 .im_history_select_active .im_message_outer_wrap:hover .im_message_fwd_date,
+.im_history_select_active .im_message_outer_wrap:hover .im_message_author_admin,
 .im_history_select_active .im_message_outer_wrap:hover .im_message_views_cnt,
 .im_history_select_active .im_message_outer_wrap:hover .im_message_sign_link {
   color: #899daf;