Un-default the help-mode bindings into CUA scheme

[aartaka]

Is your feature request related to a problem? Please describe.
We have our help-mode with convenient navigation bindings. But I often end up opening an inspector or some other input side-by-side with our help pages, and then inputting text into these ends up invoking the help-mode commands, because these are a single-key bindings. Not cool.

Describe the solution you'd like
Let's only enable these bindings for CUA scheme, because:

• CUA users (keyscheme discrimination? :D) are not likely to use anything alongside the manual/describe* etc.
• Users of other schemes are not likely to use these single-key bindings, and will likely utilize their muscle memory of the respective commands instead of shortcuts.

Removing help-mode is useful, it is really (pun intended) helpful, after all. So let's just lessen the damage to Emacs/VI people :)

[Ambrevar]

Do you have other use cases beside the inspector?

Ideally, we would differentiate the input based on the "view" that's focused, that is, if it's the web view or the inspector. But it's not very clear to me how WebKit handles this.

[aartaka]

Do you have other use cases beside the inspector?

One day, we might have inputs in the manual. And that would break them severely.

Ideally, we would differentiate the input based on the "view" that's focused, that is, if it's the web view or the inspector. But it's not very clear to me how WebKit handles this.

It doesn't, really :(

[Ambrevar]

Maybe GTK can help us here to distinguish the windows...