Fix Sentry bugs

Author: CompuIves

packages/app/src/app/store/modules/editor/actions.js

@@ -218,7 +218,9 @@ export function unsetDirtyTab({ state }) {
     tab => tab.moduleShortid === currentModule.shortid
   );
 
-  state.set(`editor.tabs.${tabIndex}.dirty`, false);
+  if (tabIndex !== -1) {
+    state.set(`editor.tabs.${tabIndex}.dirty`, false);
+  }
 }
 
 export function outputChangedModules({ state }) {

packages/app/src/app/utils/get-type.js

@@ -14,7 +14,7 @@ const mdRegex = /\.md$/;
 const vueRegex = /\.vue$/;
 const svgRegex = /\.svg$/;
 
-export function getMode(title: string) {
+export function getMode(title: string = '') {
   if (title === 'favicon.ico') {
     return 'favicon';
   }

packages/codesandbox-api/src/dispatcher/index.ts

@@ -59,7 +59,7 @@ export function notifyListeners(data: Object, source?: MessageEvent['source']) {
 function notifyFrames(message: Object) {
   const rawMessage = JSON.parse(JSON.stringify(message));
   bundlers.forEach(frame => {
-    if (frame) {
+    if (frame && frame.postMessage) {
       frame.postMessage({ ...rawMessage, codesandbox: true }, '*');
     }
   });