Odoo Release Updates

[IMP] mail: revamp camera and microphone permission handling for discuss

[IMP] im_livechat: user fields

[IMP] im_livechat: speed up "_get_operator" query

[FIX] im_livechat: see name of ended live chat in discuss sidebar

[FIX] im_livechat,mail: prevent error when enabling can create in studio

[FIX] website_livechat: style consistency of livechat info panel title

[IMP] *: improve UI of the preference form and the user form for admin

[IMP] im_livechat: add line break when author changes in session history

[IMP] *: use the "icons fonts" sub-asset-bundle in all asset bundles

[IMP] mail: support out of office

[IMP] im_livechat: enhance agent overview on livechat channel