follow up pr to instant onboarding & add as second device scanner improvements

[Simon-Laux]

• fixes DCLOGIN broken when logged in #3799
• also add steps and troubleshooting link to " add as second device qr code scan" dialog add-second-device strings missing #3178
• fix help not opening for languages that have no localised help

closes #3676
closes #3803

[r10s]

thanks a lot for taking care! ❤️

some high-level comments:

• it seems fine to regard the "My Profile" screen as a confirmation dialog, indeed, nothing has happend if the user taps "back". thanks for thinking that over!

• the new "troubleshooting" button is fine, indeed, as you said, "more options" is gone, so it's better to have that directly there

• for the new anchor #multiclient-troubleshooting vs. #multiclient, regarding the current help wordings, i do not think it is necessarily an improvement. if you do not know much about "add as second device" at all, a little introduction is needed, and counts to troubleshooting as well. even if the headline is not literally correct, the "Troubleshooting" immediately follows. maybe we should have named the button just "Help" or organise the paragraphs differently.
  
  for the sake of ease and consistency, however, for now, let's stay with the anchor. at some point we will iterate over the section anyways (iroh update?), no need to change things before (also as adding anchors adds noise to translations etc.)
  esp, as there was just nothing before :)

• for the "add second device" screen, i'd unclutter the above area as follows:
  
     

[Simon-Laux]

Sure the troubleshooting section is visible, but not that much, otherwise I wouldn't have raised it as an issue:

Though we can say that people looking for it will surely find it (provided the other sections above it do not grow too much (content updates and. other languages might need less or more characters/space to express the concepts).

About renaming to "help", I wouldn't do that because of the following reasoning: To give some stereotype, some group of people try around stuff and would never "read the manual" first. I have the feeling that the word "troubleshooting" is less of a problem than admitting to needing "help" for those people. (I personally also have that tendency of trying out things before reading the manual, though I don't know if that is an effect of genetics/biology, my soul, the society/patriarchy or whatever).
But my position on this aspect is debatable, you could also argue that more people want assistant to understand what second device setup is at all, though I doubt that many people would stumble across that dialog by accident.

[r10s]

yeah, this is very nice improvement wrt layout and functionality now 👌

code lgtm - as far as i can tell :)