You can kind of sort of do this with the mappings panel of your project. It's not a generic "open all plugin windows of selected track" but you can set it up to open all the plug-in windows of a specific track or a set of plugin windows across different tracks with a hotkey.
I know, not exactly what you are looking for, but in case you didn't know you could do at least this current option, there ya go.
Cheers