Global search bar

[psugihara]

It would be great to be able to search across conversations like in Messages. The UI/UX could be very similar to Messages:

• Search bar above left-hand conversation list
• ⌘F hotkey to highlight search bar
• Results replace conversations list items
• Result shows conversation title + bolded text match with some context
• Clicking the result shows conversation and pulses result background for 4 seconds