[FEATURE] Add a switch for LinkedIn profiles for companies

[BastianBalthasarBux]

LinkedIn allows for two different profile types, and the links accordingly look different.

Links to personal profiles are prefixed like that: https://www.linkedin.com/in/

This works "automagically" with tt_address.

Links to companies are prefixed like this: https://www.linkedin.com/company/

This does not work yet. It's possible to adjust the templates accordingly, but this prevents from using both in one installation, records with personal profiles mixed with records with company profiles of LinkedIn.

Suggestion:

• Add a switch (dropdown/radio button) "Personal" and "Company". Default to "Personal", so everything is backward compatible.
• Adjust the template accordingly.

[BastianBalthasarBux]

Will be done in my own extension.