The eventual goal is to avoid UI-related stanza processing if the relevant chats
aren't in the DOM.
With the current architecture, chatboxes are created (and the stanzas
related to them processed) even if `#conversejs` isn't in the DOM.
* Initial work on making controlbox an element
* Create a shared base class
* Ceate ChatBoxViews proxy
* Update sass now that certain classes are moved to converse-chats element
This causes index offset issues with any rich elements in the message.
We could try to fix the offsets, or alternatively replace the collapsed
newlines with spaces (to maintain the original offsets), but I don't
think it's worth the effort since I'm not sure that it's a good idea to
collapse newlines in the first place.
Fixes#1083
Directives are rendered as templates and their bodies are MessageText instances.
We thereby achieve the necessary nesting of directives (and other rich
elements inside directives) by letting each directive
body render itself similarly to how the whole message body is rendered.
Changes how rich message markup is generated and kept track of.
We now have a MessageText class which subclasses String and which keeps
track of the rich markup associated with the message.
It's better to parse an incoming message stanza early, than to have
all kinds of methods throughout the codebase that does querySelector
etc.
Firstly, it allows us to catch and report errors and malicious stanzas early on.
It also simplifies programming because you don't need to try and
remember how to properly parse a stanza, all the work is done upfront
for you.
Queue messages and handle them sequentially, each time waiting for promises to
resolve before handling the next message.
Updates #1899, which likely happens because an error message is received
before messages have been fetched.
Goal is to fix a timing bug that results in `show` being triggered
before the `ChatBoxView` has been initialized, which means that 1:1
chats aren't opened when you reload the page.
