v5.15.0-beta.1

• No that's not a speck of dust you need to flick off your monitor, there's now a dot for unplayed incoming audio messages.
• The calling lobby got some remodeling and renovations done and we didn't even have to refinance.
• The new preferences window is better and faster. Go ahead and change your zoom level, toggle the theme, set a custom disappearing timer.
• You can now choose when to download and apply new updates for Signal. The dialogs got a small makeover too. Check out the setting in the new preferences window.
• Squashed lots of bugs and there are some performance improvements as well. Thank you all for your reports!