Update Russian translation
Use the LXQtranslate module to handle translations

The modules are now part of liblxqt.
Adds an UPDATE_TRANSLATIONS option

Defaults to OFF.
Moves lxqt_runner_sr_BA.ts to the translations dir.

It was stuck in the local dir.
Uses the new liblxqt modules to handle translations
Cleans up CMakeLists.txt a little bit

* Only one cmake_minimum_required() per project.
* Prepending our module location to CMAKE_MODULE_PATH is no longer needed.
* ${PROJECT_NAME} isn't need anymore in the source code.
Makes the UPDATE_TRANSLATIONS option actually work.

It wasn't being passed to the lxqt_translate_ts() function.
Use lxqt-runner.ts as the source template instead of lxqt-runner.ts.src
Merge branch 'master' of github.com:Ilya87/lxqt-runner

* 'master' of github.com:Ilya87/lxqt-runner:
  Update Russian translation
Fixes lxde/lxqt#347. HtmlDelegate on runner's list.
Update lxqt-runner_pl_PL.ts

Few urgent changes in Polish translation