MR annotations interfere with pinch-to-zoom gesture

[wtimme]

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1. Open the app
2. Make sure MapRoulette is enabled in the Display options
3. On the map, pan to a location where a couple of MR quests are present
4. Wait for the annotations to load and display
5. Zoom by pinching, and have at least one finger start the gesture on a MR annotation

Expected behaviour: I am to able zoom by pinching two fingers. Observed behaviour: I am unable to zoom using the gesture. Performing it just moves the map (which is probably the one finger that is not on a MR annotation).