Upgrade Converse to latest stable version

[marclaporte]

As of now: Version 7.0.4

Thanks!

[marclaporte]

Currently included Converse.js doesn't render well on mobile devices. An upgrade will improve this quite a bit.

[stuffeh]

On line 62960 of plugin/fastpath/classes/widget/converse.js, you can change the default to fullscreen and mobile as well, it's possible to add some code to detect if the user is using mobile or desktop and switch the modes on demand. Can also add view_mode: 'fullscreen' / 'mobile' to the var dec config around like 65 in fastpath/classes/ofmeet.js. However, mobile shows a blank screen.

After looking at the CSS, there is a lot of lines referencing a mobile layout. But it's all so convoluted from being generated by sass that I cannot make heads or tails of what's going on.