refactor a bit more

src/actions.ts

@@ -3,7 +3,7 @@ import { removeFocus } from "./eval";
 
 export const actionShortcuts: [string, string[], string][] = [
   ["call"     , ['c'], "expr ⌴"             ],
-  ["transform", ['.'], "⌴ expr"             ],
+  ["transform", ['t'], "⌴ expr"             ],
   ["assign"   , ['a'], "let (⌴ = expr) in ⌴"],
   ["declare"  , ['d'], "let (⌴ = ⌴) in expr"],
   ["lambda"   , ['l'], "λ⌴. expr"           ],
@@ -19,7 +19,7 @@ export function getActions(globalContext, setState) {
         }));
         globalContext?.doHighlight.call();    
     },
-    '.': () => {
+    t: () => {
         setState(state => ({
           kind: "call",
           fn: initialEditorState,