Cumulative update

Checker (auto-test feature) improvements

• Variables can be used in messages from checker #1602
• on_success event (and even multiple handlers for simpler scripts)
• --close option for 2D-model to close window

Build system and code improvements

• Add CONFIG+=use_system_quazip2 to build with system-wide quazip2 library
• Add CONFIG+=trik_nopython option to build without Python support
• Python 3.10 compatibility
• Reduce code base (removed obsolete QReal plugins)
• Support QtIFw both 3.x and 4.x
• Centos7 CI build

Other minor improvements

• Fix memory leak in dock window
• Fix translations for standard dialogs from Qt5
• Fix startup language (support system-wide locale)

New Contributors

• @vkutuev made their first contribution in #1605

Full Changelog: 2022.2...2023.1