* Fullscreen chat: now uses a custom page (in other words: when opening the chat in a new tab, you will have the Peertube menu). WIP
* some code refactoring (getBaseRoute moved to util/uri, ...)
Replacing webpack by ESBuild for client code compilation (as in the
official quickstart plugin).
So we can remove deprecated webpack dependencies.
Note: webpack is still used for ConverseJS build.
This may be removed soon.
Related to issue #122.
* Builtin Prosody, Share chat url: option to have a transparent background (for streaming integration).
* Builtin Prosody, Share chat url: fixed new day hidding when no scrollbar in readonly mode.
