Feature/shortcuts/globalshortkeys

[avielc]

ability to quickly open and close franz

Description

using Ctrl+W to quickly close is great!
Adding an ability like Ctrl+E to quickly do the open will be a perfect addition to such shortcut

Motivation and Context

one typical scenario i can think of is when you use it and someone you don't want to see your screen comes over, you can quickly close franz , but to open it again you have to drag the mouse to double click and open the app.
It can be much faster to do it with a shortcut key that could be close by to the Ctrl+W, I was specifically thinking of Ctrl+E - but if there are anything else which would be just as comfortable, i'm good for it 👍

How Has This Been Tested?

N/A

Screenshots (if appropriate):

N/A

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project (run $ yarn lint).

1. make sure Ctrl+W isn't limiting the app from opening (There is a bug of that kind right now on Beta11)
2. pressing it and opening it again without selecting any app, - to make sure it works
3. using the Ctrl+E to open the app after jumping between different applications to see its not limited to a specific window context or old "active" franz instance that is still marked active.