Log Message:
Update to 2.2.1, provided by Juan RP in PR 20237.
Changes:
* GtkTreeView [Kristian Rietveld]
  - made GtkTreeSortable work as the documentation advertises [Jarek Dukat]
  - fixed gtk_tree_view_set_sort_column_id so you can disable sorting [Soeren
    Sandmann, Jarek Dukat]
  - TreeView search now works on all values transformable by GValue and not
    just strings [Muktha Narayan]
  - _move/_swap fixage in the Stores [Matthew Tuck, Paolo Maggi]
  - a lot of misc bug fixes [Alex Duggan, Carlos Garnacho Parro, Hans Petter
    Jansson, Kjartan Maraas, Soeren, Dave Camp, Murray Cumming, Dave Cook,
    Gaël Le Mignot, Vasco Alexandre da Silva Costa]
* GtkTextView [Matthias Clasen]
 - Fix keynav with invisible cursor
 - Fix misdrawing of cursor [Owen Taylor] and selection
 - Many miscellaneous fixes [Narayana Pattipati, Daniel Elstner]
* Fix problem with accidental inclusion of a main() [Matthias]
* Documentation improvements [Matthias, Havoc Pennington]
* Fix problem with GtkColorsel and pixmap themes [Daniel]
* Fix race condition with GdkRGB in PseudoColor [Shivaram Upadhyayula]
* Warning fixes [Manish Singh]
* configure fixes [Akira Tagoh]
* New and updated translations (ca,de,es,et,ko,mn,pl,pt,vi,zh_CN)
* Miscellaneous bug fixes [Matthias, Daniel, Martin Gansser, Louis Garcia,
  Tommi Komulainen, Thomas Leonard, Ian Peters, Arvind Samptur,
  Soeren Sandmann, Hidetoshi Tajima, Owen]