[#181] update breakpoint to 768, add a TODO

src/web/App.mjs

@@ -47,7 +47,7 @@ class App {
         this.workerLoaded  = false;
         this.waitersLoaded = false;
 
-        this.breakpoint = 1024;
+        this.breakpoint = 768;
     }
 
 
@@ -59,6 +59,7 @@ class App {
     setup() {
         document.dispatchEvent(this.manager.appstart);
 
+        // @TODO: add a window resize listener
         if (  window.innerWidth >= this.breakpoint ) {
             this.initialiseSplitter();
             this.setCompileMessage();