This commit contains multiple changes to improve the composer behavior especially in the context of a thread:
- Generally rename anything of the form `chatChannelThread...` to `chatThread...``
- Moves the textarea interactor instance inside the composer server
- Improves the focus state and closing of panel related to the use of the Escape shortcut
- Creates `Chat::ThreadList` as a component instead of having `Chat::Thread::ListItem` and others which could imply they were children of a the `Chat::Thread` component
Joffrey JAFFEUX