add focusSendBoxInput method #2168

Job	Run time
Build	2m 43s
Static code analysis	2m 46s
Type definitions test	2m 45s
Build samples	27s
Unit test	2m 44s
Merge test snapshots	2s
HTML test (${{ format('{0}/{1}', matrix.shard-index, matrix.shard-count) }})	-1s
Merge test results	7s
	11m 33s

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