fix(viewport): preserve zoom mode on wheel pan (#53) #340

Job	Run time
Rust lint and unit tests	1m 19s
Build integration artifacts	2m 52s
Packages and VS Code extension	32s
Client lint, build, and tests	29s
Android emulator integration	5m 43s
CLI simulator integration	8m 21s
JS API simulator integration	4m 2s
	23m 18s

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