editor: Do not highlight selected text + Clear highlight preemptively when new selection is detected #43822

Job	Run time
(Linux) Run Clippy and tests	10m 25s
Check Postgres and Protobuf migrations, mergability	14s
(macOS) Run Clippy and tests	6m 56s
(Linux) Build Remote Server	1m 26s
Check formatting and spelling	29s
(Windows) Run Clippy and tests	14m 44s
Create a macOS bundle	0s
Linux x86_x64 release bundle	0s
Linux arm64 release bundle	0s
Auto release preview	0s
	34m 14s

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