On 2.79 i used to click alt+F11 if i remember correctly.On 2.8 i cannot find,even on Preferences/Keymap tab,a way to check or assign a key to this specific command..
Only way to toggle it is from Window topbar,as in picture
I even tried to search on keymap the word "full",and this is the result,that specific command is missing it seems...Is it even possible ?Is there another way i can manually assign it ?Cant find anything online about this specific command