[BUG] (angular) - Contacts list demo has several issues

[AhsanAyaz]

While testing the contacts list demo, I found several issues. Listing them down and will raise a PR fixing all of them at once.

1. Incorrect URL for the server (should be 10003 instead of 10002)

2. The "Message" button doesn't work for sending a message to the contact. Results in a blank screen

3. The contact's links (based on JSON data) are not "linkified". I.e. we can't click and open them

4. Usage of icons are broken (e.g. HTML ends up with locationOn instead of location-on)

Also, making the prompt a bit dynamic to include correct icons of URL, location, calendar, etc

5. This is more of an enhancement, but following and messaging a contact should result in a card/UI which shows the name of the person followed, and perhaps a back button. I've fixed that locally. Will include in the PR

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I will raise a PR for all of these.