2019-09-24-production.0

New Features

• Restrict upload file formats (#7273) (2c03e789)

Bug Fixes

• Replace brandname in modal (#7327) (60bf4136)
• Don't update last event timestamp on injected events (#7313) (ec0d698f)
• Keep call UI on GROUP_LEAVE event from another self client when call is already accepted (#7311) (a62fae0e)
• Don't alter links in code blocks (#7310) (934b169c)
• Make disable buttons more obvious (#7304) (cf8e3630)