XWIKI-18860: Cleanup and integrate the Netflux front-end (realtime-netflux-frontend)

xwiki-platform-core/pom.xml

xwiki-platform-core/xwiki-platform-netflux/pom.xml

...ux-api/src/main/resources/ApplicationResources.properties

...api/src/main/resources/ApplicationResources_fr.properties

xwiki-platform-core/xwiki-platform-realtime/pom.xml

...wiki-platform-realtime/xwiki-platform-realtime-ui/pom.xml

...atform-realtime-ui/src/main/resources/RTFrontend/Ajax.xml

...e-ui/src/main/resources/RTFrontend/ConfigurationClass.xml

...realtime-ui/src/main/resources/RTFrontend/ConvertHTML.xml

...rm-realtime-ui/src/main/resources/RTFrontend/ErrorBox.xml

...form-realtime-ui/src/main/resources/RTFrontend/GetKey.xml

...orm-realtime-ui/src/main/resources/RTFrontend/Version.xml

...orm-realtime-ui/src/main/resources/RTFrontend/WebHome.xml

...-platform-realtime/xwiki-platform-realtime-webjar/pom.xml

.../xwiki-platform-realtime-webjar/src/main/webjar/cursor.js

...ki-platform-realtime-webjar/src/main/webjar/interface.css

...iki-platform-realtime-webjar/src/main/webjar/interface.js

.../xwiki-platform-realtime-webjar/src/main/webjar/loader.js

...wiki-platform-realtime-webjar/src/main/webjar/messages.js

...e/xwiki-platform-realtime-webjar/src/main/webjar/saver.js