Added a debug toolbar panel for MongoDB
I started to translate "guide-uz".
Fixed storing and loading null-values in Redis
Booleans are now stored as 0 or 1 in Redis
Fixed condition building for booleans
merge with upstream
Dynamic naming added to `DbPanel`
`MongoDbPanel` addition mentioned at CHANGELOG.md and README.md
Translate started

to be continued
update

update translate
update

update
`DbPanel` summary view fixed
Added polish guide
fix incorrect file status.
extracted date format converting to a helper class

adding and reworking the conversion of:
- ICU to PHP
- PHP to ICU
- ICU to JUI
- PHP to JUI
Added tests for empty values

use "just now" for empty time difference in Formatter.

fixed wrong language name definition
Refactored DateValidator to support ICU format
Added failing test cases for #3725
added test case for menu widget

fixes #5080
Merge pull request #5027 from yiisoft/date-format-convert

[WIP] extracted date format converting to a helper class