Add alt condition back in, rename to specify igorance of shift

because this is really what this function is for - we want to
ignore specifically shift but not necessarily alt (despite
this probably not having any real impact).

src/Keyboard.js

@@ -69,11 +69,11 @@ export function isOnlyCtrlOrCmdKeyEvent(ev) {
     }
 }
 
-export function isCtrlOrCmdKeyEvent(ev) {
+export function isOnlyCtrlOrCmdIgnoreShiftKeyEvent(ev) {
     const isMac = navigator.platform.toUpperCase().indexOf('MAC') >= 0;
     if (isMac) {
-        return ev.metaKey && !ev.ctrlKey;
+        return ev.metaKey && !ev.altKey && !ev.ctrlKey;
     } else {
-        return ev.ctrlKey && !ev.metaKey;
+        return ev.ctrlKey && !ev.altKey && !ev.metaKey;
     }
 }