Hass.io Configurator Core add-on reverted.

[frenck]

I've just reverted the latest release of the hass-configurator inside the core add-on: home-assistant/addons#1094

Issues reported with the latest version:

• New "File editor" (Configurator 4.4) UI not loading home-assistant/addons#1093
• configurator can't use home-assistant/addons#1092
• File Editor (Configurator) doesn't start anymore home-assistant/addons#1095
• file editor problem home-assistant/addons#1096

[danielperna84]

The offline-files are missing in the MANIFEST.in file. Didn't notice it since in my dev-environment they were present. Will fix that later today.