[Backport release-3_40] [georeferencer] Fix the layer -> georeferencer menu action when in dock panel mode #36846

Job	Run time
build (24.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, OFF, OFF, ON, false)	1h 50m 4s
build (39, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, ON, ON, OFF, false)	3h 6m 5s
clang-tidy (24.04, 5)	9m 41s
Run tests (5, ALL_BUT_PROVIDERS)	31m 5s
Run tests (5, POSTGRES)	7m 31s
Run tests (5, HANA)	13m 51s
Run tests (6, ALL_BUT_PROVIDERS)	40m 37s
Run tests (5, ORACLE, 24.04, binary-for-oracle)	7m 36s
	6h 46m 30s

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