7027013: Regression: JComponent.revalidate() has no effect on invisible components
Summary: Dialog.conditionalShow() should call validateUnconditionally() instead of simple validate()
Reviewed-by: art, dcherepanov
^build/
^dist/
/nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/