[gnome-shell] (14 commits) ...mpris: Make forward/backward insensitive when unavailable

[Florian Müllner <fmuellner src gnome org>]

Summary of changes:

  796fdca... dateMenu: Enforce calendar column width (*)
  4b166dc... dateMenu: Do a better job at size freezing while browsing d (*)
  da831e8... weather: Add WeatherClient (*)
  62606c6... dateMenu: Add Weather section
  0e0caee... weather: Skip loading indication when updating frequently
  239b67e... messageList: Make canClear public and notify on changes
  d3bb790... calendar: Add "Clear All" button to message list
  8a6157c... messageList: Remove section clear button
  fec511c... calendar: Only show section title for other days
  c4f2bb5... messageList: Keep secondary actor when showing close button
  f3d1c78... calendar: Use relative times for notification timestamps
  d3c050b... Refine notification style
  846e3f8... calendar: Add calendar icon to events
  1981652... mpris: Make forward/backward insensitive when unavailable

(*) This commit already existed in another branch; no separate mail sent