added more keyboard controls

* vim keys
* go to first/last slide

src/ui/src/components/KeyboardControl.js

@@ -37,12 +37,14 @@ const KeyboardControl = ({openFile, mode, setMode, deck, setShowTips}) => {
 					setMode(Mode.PRESENT);
 					break;
 				case "ArrowLeft":
+				case "j":
 				case "PageUp": // PRESENTER
 					if (slide <= 0)
 						return;
 					setSlide(slide - 1);
 					break;
 				case "ArrowRight":
+				case "k":
 				case "PageDown": // PRESENTER
 					if (slide >= deck.length -1)
 						return;
@@ -53,6 +55,12 @@ const KeyboardControl = ({openFile, mode, setMode, deck, setShowTips}) => {
 						return;
 				 	setMode(mode === Mode.BLACKOUT ? Mode.PRESENT : Mode.BLACKOUT);
 					break;
+				case "g":
+					setSlide(0);
+					break;
+				case "G":
+					setSlide(deck.length - 1);
+					break;
 				case "Tab":
 					event.preventDefault();
 					setShowTips(true);

src/ui/src/components/Tips.js

@@ -3,10 +3,12 @@ import React, {Fragment} from "react";
 const Cheatsheet = Object.freeze([
 	["Start presentation", "F5"],
 	["Stop presentation",  "ESC"],
-	["Open file",          "Ctrl+O"],
+	["Open file",          "⌘+O"],
 	["Next slide",         "→, Page up"],
 	["Last slide",         "←, Page down"],
 	["Black screen out",   "B"],
+	["Go to first slide",  "g"],
+	["Go to last slide",   "SHIFT+G"],
 	["Show/Hide tips",     "TAB"]
 ]);