D25405: Fix Step infobrowser and examples localization

[Yuri Chornoivan]

yurchor created this revision.
yurchor added reviewers: KDE Edu, Localization.
Herald added a project: KDE Edu.
Herald added a subscriber: kde-edu.
yurchor requested review of this revision.

REVISION SUMMARY
  Currently (version 19.12), all object info and examples localizations are useless. This patch fixes current way of extracting and using Step translations.

TEST PLAN
  1. Extraction works. However, I'm uncertain if it is worth to have separate catalogs for object infos and examples (please, give an advice).
  
  2. Translation (when put into the common /po dir) compiles (with an additional CMake flag -DSTEP_BUILD_TRANSLATIONS=true) and works. Translations are installed into the objinfo/<locale> dir to avoid conflicts with current lag packs. It is tested that Step can display the compiled localized HTML files.

REPOSITORY
  R341 Step

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25405

AFFECTED FILES
  step/CMakeLists.txt
  step/data/CMakeLists.txt
  step/data/Messages.sh
  step/data/examples/CMakeLists.txt
  step/data/objectinfo/CMakeLists.txt
  step/data/resources.qrc
  step/data/tutorials/CMakeLists.txt
  step/infobrowser.cc

To: yurchor, #kde_edu, #localization
Cc: kde-edu, narvaez, apol
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