fix: Upload attachment progress

[petersalomonsen]

File upload is now adjusted to use the progress events from HttpClient in @angular/common/http.

Also the progress events don't fire when using a serviceworker, so commit 16b4b9d is about bypassing the service worker for the file upload URL.

The problem is mentioned in the following Angular issues:

angular/angular#21191
angular/angular#24683

Hopefully just letting the fetch event handler return instead of calling event.respondWith() could be supported for selected patterns/URLs in future Angular versions. See the exact patch of ngsw-worker.js here:

runbox7/ngsw-worker-patched.js

Line 1941 in 16b4b9d

// Bypass serviceworker when uploading files so that we can get upload progress

(currently this file is just copied into the dist folder after build so it needs to be updated if there are new versions of @angular/service-worker)