FLUID-5205: Modified the aux builder to accommodate the new definition for sub-panels in a structure as:
panels: {
    "always": ["subPanel5"],,
    "fluid.prefs.subPanel5": ["subPanel6"],
    "fluid.prefs.subPanel6": ["subPanel7", "subPanel8"]
}
Merge remote-tracking branch 'cindy/FLUID-5205' into FLUID-5205