fix structure-actions.md link
translate spanish runtime-handling-errors.md
Added guide on Url helper
fix typo
add ArrayHelper guide in Russian
Merge pull request #6316 from larnu/spanish_docs

fix structure-actions.md link and translate handling errors into spanish [skip ci]
fix ArrayHelper constant in Russian guide
Merge pull request #6317 from ivanartamonov/master

[skip ci] Add ArrayHelper guide in Russian
spanish guide translation
Updated README.md
Merge pull request #6319 from pana1990/guide-es

Guide es [skip ci]
[Uk] Guide corrections [skip ci]
Renamed  subtitles [skip ci]
Fixes #6311: Optimistic lock for ActiveRecord does not work as expected
Fixes #6318: Made widgets more error-tolerant and user-friendly when certain option values are null
[Uk] Guide corrections and fixes. Adding images [skip ci]
[Uk] Cleaning up [skip ci]
Merge pull request #6320 from yiiframework-ua/uk_translate

[UK] Guide corrections [skip ci]
suppress warning thrown by IntlDateFormatter::parse()

Works around PHP Bug https://bugs.php.net/bug.php?id=68528

fixes #5962