feat(Proton Mail): Remove "Sent from Proton Mail" signature

[CoderMonkey1956]

Feature description

Not sure if this counts as payment circumvention, but you can already do this on your own by deleting the signature for every email you send. Proton Mail has a feature on mobile where it sends a "Sent from Proton Mail Mobile" or smth like that. I think it would be really cool if there was a patch to avoid this.

Motivation

Q: Why should this feature be implemented?
A: This is a common complaint in the Proton community (just search for it in the subreddit) and would be SUPER helpful.

Q:What is the explicit use case?
A: Not having to delete the signature for EVERY. SINGLE. EMAIL.

Q:What are the benefits?
A: Revanced being the saviors of the Mobile Proton Mail community and more app functionality

Q: What makes this feature important?
A: Its something the Proton community has been wanting for a while and having Revanced be the heros of the day also just seems pretty cool

Acknowledgements

• I have checked all open and closed feature requests and this is not a duplicate
• I have chosen an appropriate title.
• All requested information has been provided properly.

[Anajrim01]

Certainly, I'll have a look at this.

[AoifeMcCull]

Requested feature already exists for paid users, meaning this feature request violates guidelines found here.
The setting is found in Settings > Account settings > Display name and signature > Mobile signature.

[oSumAtrIX]

I'd say this gets a pass as signature is a pretty basic feature.

[CoderMonkey1956]

My opinion on the policy thing is that it's a grey area. Yes the feature is locked behind a paywall, but you can already do this and Id say many people do just delete the signature every email (you can do that)

Just my opinion though