Inline-video responsive patch

Altered to 512 x 288 (16:9)

This only impacts inline-videos, I did not alter code for responsive iframe embeds (YouTube).

Room owners and moderators received via method call then stream

Prevent browsers from trying to validate the input fields

This will stop the browsers such as Firefox from trying to validate the input field since they are handled by the javascript.

# Conflicts:
#	i18n/en.i18n.json

Created and pushed by LingoHub.

Allow SMTP server with no login - closes #1883

Only require smtp host to be present. And include username and password if they are provided.

Improve the layout and info of the oauth popup

Logout other clients

Outgoing webhook reponse

Fixes a bug with search results, where sometimes cog wasn't displayed.

Closes #1866; Do not close Desktop Notifications to keep them in noti…

Use 'mim-types' ty check content type and compare to extension

Closes #1882