HWI Bridge design improvement

[ben-kaufman]

According to the Figma files shared by @GBKS @AlexaAker (BitcoinDesign/Meta#69 for more details)

As you can see in the screenshots below, the main changes are:

• The HWI Bridge settings screen now has 3 options: local, remote, and advanced.
• If remote or advanced were chosen, a warning will show up reminding the user to edit their Preferences.
• HWI whitelist iframe was removed and instead has now a link directing to it, as part of the instructions displayed below the options.
• The app Preferences screen now hides by default all "Advanced" settings normally unnecessary for users.
• The main page will now detect if the URL of a user accessing Specter is not local (meaning Specter likely runs remotely), and will direct the user to update the HWI settings - if the remote option there is not already selected.
• The toolbar at the top right corner now shows a Specter icon to get back to the helper page (and the price settings now colored in blue)
• All the terminology around the HWI bridge has been simplified to terms like "USB connections", and "Remote/ local" Specter.

Next thing I hope to do is to separate the HWI software to its own packaged app - so it will be possible for users to use Specter remotely with the browser, and have the HWI Bridge app just separately installed. I think this would simplify the instructions for users quite a bit, but needs some more work.

CC:
@GBKS
@ConorOkus
@AlexaAker

Please take a look at the screenshots/ try the changes, and let me know what you think, and if you have any comments or further suggestions.

[k9ert]

Great work! Special thnaks to @GBKS @AlexaAker and the rest of the UI-team for the great recommendations in multiple iterations on how to improve the UI/UX.
Merging!