FxValue: removed selectedLanguage and maxInputLength (selectedLanguage was never used and didn't really work as intended anyways, maxInputLength is redundant since it can be retrieved from the environment)

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@2952 d35d4baa-7912-0410-b0ae-edacad209e15
FxContent#replaceData: fixed exception when other content does not contain the XPath

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@2953 d35d4baa-7912-0410-b0ae-edacad209e15