Refine wording about trust

Currently Bitmask shows the following hint on initial provider setup:

When using a VPN you are transferring your trust from your Internet Service Provider to your VPN provider. Bitmask only connects to providers with a clear history of privacy protection and advocacy.

While that statement is true for preselected providers, we cannot say anything about manually added LEAP providers, so I find this statement missleading.

Similarly we have the sentence:

Bitmask connects to trusted providers that are not publicly listed. Enter your provider’s url below.

Tbh. we can't say if they are trusted or not. We can only say these providers are using the LEAP VPN tech stack.

@mcnair @kwadronaut ping for proposals :)