ux: completion window border #3979

Job	Run time
Prepare version string	5s
Build / Build Windows ARM64	4m 28s
Build / Build macOS (Apple Silicon)	3m 29s
Build / Build macOS (Intel)	6m 13s
Build / Build Windows x64	3m 49s
Build / Build Linux	3m 16s
Build / Build Linux (arm64)	3m 38s
Package / Package macOS (osx-x64)	14s
Package / Package Windows (win-x64)	23s
Package / Package macOS (osx-arm64)	21s
Package / Package Windows (win-arm64)	34s
Package / Package Linux (linux-x64)	1m 5s
Package / Package Linux (linux-arm64)	1m 5s
	28m 40s

Provide feedback