Related to: https://protonmail.uservoice.com/forums/284483-proton-mail/suggestions/12802572-plain-text

Currently, we can set the Composer mode to Plain Text in the settings at https://account.proton.me/u/0/mail/general. However, when replying to an email that was received in HTML format, the reply defaults to HTML mode as well. Although we can manually switch to Plain Text while composing the reply, it would be ideal if we could set Plain Text as the default for all replies, regardless of the format of the received emails.