Merge pull request #2150 from zelenin/constant-define-fixes

Fix typos in constant
More on URL Management
Added more info to Performance Tuning
Fixed refactoring
minor code style and phpdoc fix
Doc typo
Merge pull request #2152 from kate-kate/patch-1

Doc typo
add timeZone into base formatter
fix formatter
prevent changing public timezone
Merge pull request #2137 from Ana1oliy/issue-1659

issue #1659: released buildLimitOffset() for MSSQL
doc fix
remove timezone from i18n formatter
Merge pull request #2155 from dizews/timezone-in-base-formatter

add timeZone into base formatter
doc fix.
Fixed test break.
fixed test break
fixed test docs for codeception extension
added titles, fixed formatting
Allow writing widgets using return instead of echo in the run method to make it consistent with controller