fix #3478

it correct work with integer keys of list
Masked input widget upgrade fixing #3196

Support contribution credits updated
Escaping of the special characters at 'MATCH' statement reworked
Merge branch 'master' of github.com:yiisoft/yii2
Merge pull request #3703 from kartik-v/patch-5

Masked input widget upgrade fixing #3196
Docs for Sphinx extension updated
Merge branch 'master' of github.com:yiisoft/yii2
Docs for Sphinx extension updated
Extra tab symbol removed
Typo fixed
Docs about handling missing translations added
yii\redis\ActiveRecord::deleteAll() refactoring - no need to write to socket 2 times when nothing found
yii\redis\ActiveRecord::deleteAll() refactoring - no need to write to socket 2 times when nothing found
Started Russian translation of the guide and internals
yii\redis\ActiveRecord::deleteAll() refactoring - code style updated
yii\redis\ActiveRecord::deleteAll() refactoring - code style updated
Merge pull request #3711 from savvot/master

yii\redis\ActiveRecord::deleteAll() refactoring
guide WIP [skip ci]
Fixes #3715: Fixed the bug that using a custom pager/sorter with `GridView` may generate two different pagers/sorters if the layout configures two pagers/sorters
Merge pull request #3479 from lynicidn/patch-4

fix #3478