Fixes #2121: CMssqlSchema::resetSequence() incorrectly resets sequence.
Fixes #2217: CHtml::radioButtonList() now supports $empty option.
Merge pull request #2218 from resurtm/fixes-2217

Fixes #2217: CHtml::radioButtonList() now supports $empty option.
Merge pull request #2214 from resurtm/2121-MSSQL-CDbFixtureManager

Fixes #2121: CMssqlSchema::resetSequence() incorrectly resets sequence.
Update CJuiButton.php

Fix.
Merge pull request #2226 from marsuboss/patch-1

CJuiButton.php doc update
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