[gnome-nibbles] (27 commits) Non-fast-forward update to branch arnaudb/fix-level-25

[Arnaud B. <arnaudb src gnome org>]

The branch 'arnaudb/fix-level-25' 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:

  62f00ca... Fix level 25.

Commits added to the branch:

  07fac33... Add myself as a maintainer. (*)
  74cc1b8... Make levels more human readable. (*)
  3dd136a... Make levels even more human readable. (*)
  ddfa815... Fix level 24. (*)
  66b7e72... Add Speed panel. (*)
  8a5a9da... Clear Preferences dialog code. (*)
  ef57c30... Rework Preferences dialog. (*)
  afbf2a3... Clean ControlsGrid. (*)
  07316c4... Add translators comments. (*)
  6e32d09... Fix some warnings. (*)
  bbe9da5... Do not start game with uncontrollable worm. (*)
  590d4fe... Remove Preferences entry. (*)
  deebce0... Allow to set a key used by absent worm. (*)
  c79674b... Do not allow multiple worms to use same control. (*)
  d6fc697... Warn when a key is assigned to multiple controls. (*)
  7e6df96... Fix typos. (*)
  2555548... Remove CSS warnings. (*)
  52dea26... Remove unused signal. (*)
  19b1754... Avoid a textual repetition. (*)
  93d6cbf... Move UI files in ui folder. (*)
  7057e0b... Fix Preferences dialog background color. (*)
  518572f... Make a MessageDialog modal on the correct window. (*)
  1299e92... Disable back action on level ended. (*)
  16e470f... Translate "Number of players" screen. (*)
  b94b34e... Improve Controls labels. (*)
  e365e38... Fix level 25.
  3e4001d... Rework worms direction code.

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