How do I identify which preference panes are 32-bit and which aren't Recently my Sound preference pane has asked me to reopen System Preferences when I select it, or when I switch away from it. 

I have added a few preference panes (e.g. Wacom, an Xbox controller pane, etc). 

I'd like to know how to identify all the 32-bit vs 64-bit preference panes? 

I would like to start uninstalling the ones I don't find necessary any longer and hopefully streamline this.
System Information (About this Mac - System Report) shows which are 32 and which are 64 bit. No 32-bit Preference Panes exist in my screenshot, however, as this is High Sierra.