Update to 2.28.2:

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gedit 2.28.2
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New Features and Fixes
======================
- Fix regressions/warnings due to mistakes in OS X integration

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gedit 2.28.1
============

New Features and Fixes
======================
- Fix regressions in the External Tools plugin (Jesse van den Kieboom)
- Better OSX integration (Jesse van den Kieboom)
- Misc bugfixes

New and updated translations
============================
- ca (Gil Forcada)
- crh (Reşat SABIQ)
- lv (Rūdolfs Mazurs)
- ro (Adi Roiban)
- ru (Alexander Saprykin)
- sl (Matej Urbančič)
- th (อาคม โชติพันธวานนท์)
- th (Theppitak Karoonboonyanan)

(wiz)