gtranslator: update to 3.32.1.

NEWS from gtranslator 3.32.1 (2019-04-21):
- Fix translation in flatpak

NEWS from gtranslator 3.32.0 (2019-03-11):
- Stable release, updated translations

NEWS from gtranslator 3.31.90 (2019-02-03):
- XML language syntax for the source view
- Fix msg status management
- Use theme_fg_color for translated texts
- Better prj id version default header
- Header with default values when doesn't exists
- codeview: Recover codeview plugin
- Show context in the original message bar
- List of languages in a config file instead iso-codes
- Find & replace and copy text to shortcuts window
- Ctrl+space to copy original text into translated
- Native File Chooser for the translation memory

NEWS from gtranslator 3.30.1 (2018-11-11):
- Fix locale lookup dir
- Added itstool dependency to Meson
- Fix loading help
- New interface image in help
- Update Brazilian Portuguese translation
- Update Polish translation

NEWS from gtranslator 3.30.0 (2018-11-03):
- Full interface redesign to acomplish gnome 3 HIG
- Fix bug in find & replace that marks all fuzzy as translated
- Autofill profile based on language
- A lot of bug fixes
- Remove plugin system

(wiz)