Add searching functionality to the chat selection screen

[jrichardsen]

No description provided.

[jrichardsen]

Not sure whether the search bar should stay visible all the time. It is more discoverable that way, but in theory it wastes screen space...

[codecov]

Codecov Report

Attention: Patch coverage is 43.33333% with 68 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/ui/widget/chat_selector.rs	59.7%	35 Missing ⚠️
src/ui/app.rs	0.0%	33 Missing ⚠️

Files with missing lines	Coverage Δ
src/ui/app.rs	0.0% <0.0%> (ø)
src/ui/widget/chat_selector.rs	85.7% <59.7%> (-9.0%)	⬇️

[tofubert]

I think visibility is good here, if there is to many rooms, we can always add a second column.