Add ability to disable shortcuts in Ray 3

[pindab0ter]

The Ray 3 beta (3.0.0-beta.18) ships with a number of default global shortcuts. One of them for example is Toggle always on top: ⌘+⇧+T. This directly conflicts with any browser's shortcut to reopen the most recently closed tab.

Instead of reassigning this shortcut to a different key that might collide with something else, I would like the option to disable a shortcut altogether.

Relates to issues such as #875, #115 and #69.

[freekmurze]

@pindab0ter thanks for the suggestion.

@DriesH could you take a look at this one?

[UVLabs]

There was also a change where before clearing was command + k but now everything requires shift as part of the shortcut.

[DriesH]

We are reworking the shortcuts. A little sneak peek:

This will be released in beta 20.

Still working out the kinks on Windows.

[pindab0ter]

Amazing! Looking forward to trying it out!