Show title for custom filter list subscriptions

[antonok-edm]

The Title field of custom adblock filter list subscriptions was previously exposed to the browser (#17910), but never shown in the UI. It should be displayed instead of the subscription URL, if it is available.

[MadhaviSeelam]

Verification PASSED using

Brave | 1.50.90 Chromium: 111.0.5563.64 (Official Build) beta (64-bit)
-- | --
Revision | c710e93d5b63b7095afe8c2c17df34408078439d-refs/branch-heads/5563@{#995}
OS | Windows 11 Version 22H2 (Build 22621.1265)

New profile:

1. Install 1.50.90
2. launch Brave
3. open a new-tab
4. visited brave://settings/shields/filters
5. added https://filters.adtidy.org/extension/chromium/filters/17.txt to the Add custom filter lists section
6. confirmed that the title of the first column in the table displayed as List title
7. confirmed that the entry under List title is AdGuard URL Tracking filter
8. added https://raw.githubusercontent.com/AdguardTeam/AdguardFilters/master/TrackParamFilter/sections/general_url.txt as second custom filter list
9. confirmed that the title is just the URL of the list (truncated as necessary to fit on-screen)
10. confirmed when hovered over each of the titles, mouseover text shows the full original URLs used to subscribe to each

step 5	step 6-7	step 9	step 10a	step 10b

Upgrade:

1. Install 1.49.120
2. launch Brave
3. open a new-tab
4. visited brave://settings/shields/filters
5. added https://filters.adtidy.org/extension/chromium/filters/17.txt to the Add custom filter lists section
6. verified that the title of the first column in the table is displayed as List URL and full URL is displayed
7. added https://raw.githubusercontent.com/AdguardTeam/AdguardFilters/master/TrackParamFilter/sections/general_url.txt as second custom filter list
8. close the browser
9. install 1.50.90
10. rename the Brave-Browser profile as Brave-Browser-Beta
11. launch Brave
12. got to brave://settings/shields/filters

• Confirmed that the title of the first column in the table displayed as List title instead of List URL
• Confirmed the first entry under List title in the Custom lists table is AdGuard URL Tracking filter instead of full URL
• Confirmed the second entry in the Custom lists table is displayed as URL and is truncated
• Confirmed when hovered over each of the titles, mouseover text shows the full original URLs used to subscribe to each

step 1	step 4-7	result	result