[mutter] (4 commits) Non-fast-forward update to branch cherry-pick-5d19aee2

[Marco Trevisan <marcotrevi src gnome org>]

The branch 'cherry-pick-5d19aee2' 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:

  e19f9d4... actor: Always use get_paint_volume override for active effe
  13c8415... actor: Also recompute paint volume if we recently dropped e

Commits added to the branch:

  398f03b... window: unmanage dialog when clearing transient_for (*)
  02e80af... actor: Fix logic error in determining terminal effect for p (*)
  075bfc4... actor: Always use get_paint_volume override for active effe
  037d991... actor: Also recompute paint volume if we recently dropped e

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