Replace Accessibility Zoom default shortcuts with more standard shortcuts

Feature summary

Please consider switching Accessibility shortcuts to be more standard with The shortcuts Super + Plus (+) for zooming in and Super + Minus (-) for zooming out. This would help people with disabilities (Especially Visually Impared who cannot read text on screen without Magnifier assistance) and new comers alike who needs zoom to use their computers get started with Gnome more easily and quickly. These shortcuts feel much Friendly and natural and most importantly easy to remember compared to the current default.

How would you like it to work

The default shortcuts for zooming in and zooming out to be replaced with the following shortcuts

Super + Plus (+) for Zooming In
Super + Minus (-) for Zooming Out

Relevant links, screenshots, screencasts etc.

Also consider Reviewing and implementing Issue 5551 which has more details on why the feature is necessary

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