Fix #1252, incorrect bookmark icon title

Fix make help

Async await

Otherwise we get an unwanted horizontal scrollbar

* src/converse-controlbox.js

    async/await causes many tests here to fail due to the controlbox toggle
    now apparently showing up a little later (and the tests don't wait for
    it to happen).

* src/converse-minimize.js

    We get timeout issues in tests.

* src/headless/converse-chatboxes.js

    We get a stack overflow while running tests.

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

In both cases we need the `catch` statement due to the fact that a
sendIQ call gets made which rejects for error stanzas (and I find the
Promise form much compacter).

Additionally, we don't want to hold up subsequent execution until
the element has been faded out.

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

So that we know an event will be emitted when the stanza is sent.

This is probably fine as a patch release. Even tough files have been
moved around, the API is still the same.

With the recent fixes in backbone.browserStorage, the 'file' attributes
gets persisted to browserStorage before Converse tries to upload the
file.

The File object can't actually be serialized, so an empty map gets
stored and then returned together with a 'change' event.

Instead, store the file as a direct attribute on the message object.

Fixes #1261

Fix headless build webpack config

so that we can emit an event when sending a stanza.

#1257: Prefer 'probably' over 'maybe' when evaluating Audio support.