Please ask questions in a normal forum before making a wish (which is for things that definitely cannot be done or could be improved)...
You need to set a 'master layer' for each hotlinked module. The master layer will do exactly as you want... turn the entire module on or off... and otherwise, if on, the elements in the module respond to their individual layers.
http://helpcenter.graphisoft.com/guides/archicad-18-int-reference-guide/user-interface-reference/dia...
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