Detect Ctrl + S keyboard shortcut and save the form

[MatoTominac]

Description

Speed up all actions by saving the form with the Ctrl + S keyboard shortcut instead of having to click the button with your mouse. It's a common feature nowadays.

Screenshots (if appropriate):

Pull Request Checklist

• My code follows the code formatting guidelines.
• I have an issue ID for this pull request.
• I selected the corresponding branch.
• I have rebased my changes on top of the corresponding branch.

Issue Type (Please check one or more)

• Bugfix
• Improvement of an existing Feature
• New Feature

[nielsdrost7]

Thanks @MatoTominac , merged!
We'll give you credit in the readme of 1.6.1 once we release it fully.
Right now, it's merged for the Beta release 👊