#46 - WebFileChooserUI and WebFileChooserPanel fixes for filters and hidden files display
Custom file filter description display fix
CustomFileFilter class added to simplify new filters creation
DefaultFileFilter renamed to AbstractFileFilter
WebAsyncTreeFilterField translation added
WebCheckBoxTree checkboxes can now be hidden/disabled for each node in the tree
WebCheckBoxTree recursive checking option added
DefaultTreeCheckingModel logic and speed improved
Painters improved and now support component update calls
Demo application code links highlight improvements
RSyntaxTextArea library updated
Painter and margin support for WebSliderUI and WebSlider