Implement month separator for the Gallery.

Improve day separator rendering in the timeline.
Use Today, Yesterday, and the name of the day if less than 7 days and do not render the year for the current year.
Improve date format for the media viewer.
Rework how date and time are computed.
ActionListView: Time can take more space, so update the layout.

tools/localazy/config.json

@@ -80,6 +80,12 @@
         ".*voice_message_tooltip"
       ]
     },
+    {
+      "name" : ":libraries:dateformatter:impl",
+      "includeRegex" : [
+        "common\\.date\\..*"
+      ]
+    },
     {
       "name" : ":libraries:permissions:api",
       "includeRegex" : [