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fix(studio): a hovered menu row fills its row, and a host can hide the clip menu tools #19657

Job	Run time
Detect changes	20s
Preflight (lint + format)	50s
Tests on windows-latest: core	6m 6s
Tests on windows-latest: engine-cli	9m 10s
Tests on windows-latest: studio-1	8m 51s
Render on windows-latest	5m 48s
Tests on windows-latest: studio-2	7m 17s
Tests on windows-latest	3s
	38m 25s