Fix shift to zoom

[darkdh]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Ran git rebase -i to squash commits if needed.

fix #2816

[bbondy]

Sorry we don't want shift to zoom, no other browsers do it. I think there was confusion with understanding what was implemented from multiple people though.

Before we had command+= to zoom in.
But sometimes people expect it to be Command+PlusKey which is command+shift+=

I don't think we want this shortcut so closing.