[Bug] Zoom with scroll active whether or not Zoom is selected

[jeremydouglass]

In 0.14.15 desktop app for Mac, when using Image Segmentation on a Sample:

Scrolling the mousewheel / two-finger scroll on the mousepad zooms in and out, whether or not the "Zoom" icon on the left toolbar is selected. The tool-tip "Zoom In/Out (scroll)" implies that this is what the tool does, but that is active at all times.

This may cause accidental zooming, which is hard to correct on a trackpad because there is no Reset / Zoom 100% button, and sensitivity is high. Deselecting zoom / selecting "hand" or "arrow" causes the zoom magnifying icon to turn gray, but scrolling still causes zoom.