add missing javadoc
Merge pull request #170 from VincentJian/master

add missing javadoc
Feature ZK-2433: Highlight text in a listitem without using nonselectableTag
Merge pull request #169 from hanhsu/F70-ZK-2433

Feature ZK-2433: Highlight text in a listitem without using nonselectabl...
Bug ZK-2489: iscroll not working for tablet
Merge pull request #171 from hanhsu/B70-ZK-2489

Bug ZK-2489: iscroll not working for tablet