New fullscreen chat WIP:

* 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, ...)

client/common/configuration/templates/logic/channel.ts

@@ -1,6 +1,6 @@
 import type { RegisterClientOptions } from '@peertube/peertube-types/client'
 import type { ChannelConfiguration, ChannelConfigurationOptions } from 'shared/lib/types'
-import { getBaseRoute } from '../../../../videowatch/uri'
+import { getBaseRoute } from '../../../../utils/uri'
 
 /**
  * Returns the data that can be feed into the template view