feat: Allow users to replace profile browser

[SuaYoo]

Resolves #2959
Resolves #2964

Changes

• Updates browser profile dialogs to organize settings into separate "Crawler Settings" section
• Allows users to replace saved sites with new site
• Fixes browser site list loading state
• Consistently displays profile URLs

Manual testing

1. Log in as crawler to org with proxies
2. Go to browser profiles list
3. Select "New Browser Profile". Verify additional crawler settings are in a separate section
4. Select a browser profile
5. Select "Add Site"
6. Check "Replace saved sites". Verify proxy setting is shown under "Crawler Settings"
7. Start browser
8. Save. Verify previously configured sites have been replaced.

Screenshots

See #2986 (comment)

[ikreymer]

Looks great!
One small bug:

• Changing the Crawler Channel dropdown does not update the version string (only actual issue i think).

Text things:

• When there is only one URL, the Configure New Site doesn't show the dropdown - just a single URL, I guess that's fine, but could be slightly confusing.
• Should 'Add Site' be renamed 'Load URL' as discussed? Could also show the dropdown in this version of dialog to be consistent, and just label it 'Load URL'. But no strong preference per se. Perhaps the distinction between Add/Load is subtle - the site only gets 'added' once profile is saved and only if there if it's a new origin, but any URL can be loaded.

[SuaYoo]

Changing the Crawler Channel dropdown does not update the version string (only actual issue i think).

Fixed!

When there is only one URL, the Configure New Site doesn't show the dropdown - just a single URL, I guess that's fine, but could be slightly confusing.

Updated to always show the dropdown and input field for the page URL to load.

I named the dropdown "Primary Site" since the URL to load does impact the order of the origins list and browser profile list sorting, which can be sorted by the first origin in the list. I named this "Primary" instead of "First"/"Starting" or similar since we want to encourage users to have a single site per browser profile.

Browser profile list sort:

Configure profile:

Should 'Add Site' be renamed 'Load URL' as discussed? Could also show the dropdown in this version of dialog to be consistent, and just label it 'Load URL'. But no strong preference per se. Perhaps the distinction between Add/Load is subtle - the site only gets 'added' once profile is saved and only if there if it's a new origin, but any URL can be loaded.

I renamed "Configure Profile" in the action menu to "Load Profile" for consistency:

I renamed "Add" to "Load New URL". This opens the same dialog as "Load Profile", but with "New Site" pre-selected.

[ikreymer]

Looks great! Tested various options for resetting, new layout makes sense.