[gnome-shell] (8 commits) Non-fast-forward update to branch wip/fmuellner/ping-frozen-windows

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/ping-frozen-windows' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  0b386fb... closeDialog: Periodically check for window to become respon

Commits added to the branch:

  fdaddbd... Improve notification documentation (*)
  fc26559... docs: Remove obsolete files (*)
  f56e4e1... docs: Remove old style HACKING (*)
  02bbf40... docs: Use Markdown (*)
  ad3e9ab... docs: Clarify where style changes should be done (*)
  86bd5b2... Bump version to 3.29.2 (*)
  70057c6... closeDialog: Disable unredirection while showing (*)
  b03bcc8... closeDialog: Periodically check for window to become respon

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