AboutDialog launched from Java Control Panel should have a consistent jre version number

When FX deploy installed, Java Control Panel is launching from FX home dir and always using the about dialog from whatever deploy is built with. However, if we are using jre6, we should launch aboutJava6.png.

My concern is when we're using jre8 deploy to be included in fx runtime, we need to update it to have jre7 image. I suggest remove Version number from aboutDialog image and indicate version number under the image.