Download links should lead to standalone DEX apps

[norwnd]

After DEX standalone apps are available fully (eg. https://github.com/decred/dcrdex/pull/2333, https://github.com/decred/dcrdex/pull/2351) it makes sense to distribute those instead of Decrediton (like it currently does on this page):

[norwnd]

Perhaps this footer also needs adjustments, once standalone apps are finished (it currently links to Github releases page):

[xaur]

Agreed. But don't fully remove Decrediton (it still may be a better option for some users), just make the standalone app a more visible and recommended option.

Currently it is reversed: first you get the 3 big buttons to donwload Decrediton, then 1 big button for Umbrel, than the "alternative" download link "Click here to download the standalone DCRDEX application instead".

[xaur]

Thinking more about onboarding flows (https://github.com/decred/dcrdex/issues/2563) I think the issue here is "choices are hard" and the fix is to guide through the choices and explain them.

Issues I see with the downloads block:

• "Standalone" and "Decrediton" are not explained for newcomers, it is hard to make a choice
• Umbrel block looks like a Decrediton option but it is a standalone option
• Standalone is not the default option as the first comment says

To address these the downloads.html partial can be restructured as follows:

• Show two big logical sections for the standalone app and Decrediton (separate them visually with boxes or something)

• Standalone app section

  • Short paragraph explaining the benefits
  • A few screenshot thumbnails (#20)
  • Install links: Windows, macOS, Linux, (other OSes), Umbrel, AUR, other OS packages when they are added

• Decrediton section

  • Short paragraph explaining the benefits
  • A few screenshot thumbnails
  • Install links: Windows, macOS, Linux

The other partials (intro and get-started) are good, except I'd tweak the 1. Intro to point to the revised download sections instead of directly to GitHub.