Update preferences page for desktop IDE's

[loujaybee]

On the preferences page for IDE's, currently the user is presented with the default browser editor, and the desktop one is behind a toggle. This update is to make the desktop IDE's more prominent in the UI, so they don't appear hierarchically as a second-class citizen.

Note: there are many more changes required to make the desktop IDE UX smoother #6602, this is a small incremental change to make steps towards a better desktop UX.

Main proposed changes:

• Remove toggle for browser/desktop so all IDE's/editors are viewable by default
• Introduces a "none" preference for desktop IDE's (instead of the toggle)

Before	After

Link to Figma design

[mustard-mh]

@gtsiolis

1. Wondering if we have prepared an image for Desktop None?
2. Subtitle like INSIDERS has a margin-left 2, is it designed like this?
   

[gtsiolis]

@mustard-mh

Wondering if we have prepared an image for Desktop None?

We did not have one but posted a possibly good option in #7653 (comment). Feedback is welcome!

Subtitle like INSIDERS has a margin-left 2, is it designed like this?

Probably a leftover from a previous PR. We can probably remove this, see #7653 (comment).