When you are hosting a game there are a few 'quick' keys to use to speed up selections.
1. To change ALL non human slots to the desired Control type when changing one slot, hold the CTRL key and all others change to the same value as the one you are changing.
2. To jump to a specific Map, Tileset or Techtree before clicking the listbox arrow, hold SHIFT+<letter> to jump to the next item in the list starting with the letter pressed.