Overview of changes in 3.21.3
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* Bugs fixed:
 760796 Doesn't have a --version flag
 763908 preview-view: Hold the UI while saving the pipeline
 764076 application: Add API to prevent the main window from getting destroyed

* Updated translations:
 Catalan
 Gaelic (Scottish)
 Indonesian
 Norwegian bokmål
 Occitan
 Portuguese
 Portuguese (Brazilian)
 Spanish
 Turkish