Added a fifth hotkey bar. 60 keybinds should be enough for everybody! :)

game/engines/default/data/keybinds/hotkeys.lua

game/engines/default/engine/HotkeysDisplay.lua

game/engines/default/engine/HotkeysIconsDisplay.lua

game/engines/default/engine/dialogs/ShowEquipInven.lua

game/engines/default/engine/dialogs/UseTalents.lua

game/engines/default/engine/interface/ActorTalents.lua

game/engines/default/engine/interface/PlayerHotkeys.lua

game/modules/tome/class/Game.lua

game/modules/tome/class/interface/ActorInscriptions.lua

game/modules/tome/dialogs/MapMenu.lua

game/modules/tome/dialogs/ShowEquipInven.lua

game/modules/tome/dialogs/UseTalents.lua