demo: auto-resize and other tweaks #85

Job	Run time
build	1m 13s
lint	1m 24s
integration-tests (18, ubuntu, chromium)	3m 8s
integration-tests (18, ubuntu, firefox)	3m 13s
integration-tests (18, windows, chromium)	9m 32s
integration-tests (18, windows, firefox)	8m 41s
unit-tests (16, ubuntu)	1m 10s
unit-tests (16, macos)	3m 43s
unit-tests (16, windows)	6m 1s
unit-tests (18, ubuntu)	1m 4s
unit-tests (18, macos)	2m 15s
unit-tests (18, windows)	5m 18s
	46m 42s

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