FxQuartz: added getFxContext to get a FxContext instance for background jobs

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@3025 d35d4baa-7912-0410-b0ae-edacad209e15
AccountEngineBean#loadAccountAssignments: removed unnecessary SQL join that got quite slow for big ACL setups (> 100 assignments/user)

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@3026 d35d4baa-7912-0410-b0ae-edacad209e15
FxValue: disabled default fallback handling of multilanguage value data, but keep it as an option to setValueData

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@3027 d35d4baa-7912-0410-b0ae-edacad209e15
FxSQL: minor performance improvements

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@3028 d35d4baa-7912-0410-b0ae-edacad209e15
fx:navigation: don't render empty submenu nodes in HTML renderer

git-svn-id: http://svn.flexive.org/repository/flexive/trunk@3029 d35d4baa-7912-0410-b0ae-edacad209e15