"Save" and "Cancel" buttons for settings sections #29634

Job	Run time
Cancel Previous Runs	2s
Engine (GraalVM CE) (linux, amd64)	42m 17s
Engine (GraalVM CE) (macos, amd64)	16m 24s
Engine (GraalVM CE) (windows, amd64)	33m 36s
JVM Tests (GraalVM CE) (linux, amd64)	25m 14s
JVM Tests (GraalVM CE) (macos, amd64)	49m 4s
JVM Tests (GraalVM CE) (windows, amd64)	1h 13m 50s
Standard Library Tests (GraalVM CE) (linux, amd64)	24m 50s
Standard Library Tests (GraalVM CE) (macos, amd64)	41m 17s
Standard Library Tests (GraalVM CE) (windows, amd64)	34m 51s
Verify License Packages (linux, amd64)	1m 52s
	5h 43m 17s

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