Feature: Add ability to locate & launch bitcoin.conf from the UI

[yashrajd]

The current UI does not provide a way to access bitcoin.conf

• The bitcoin.conf file can be accessed from the UI in legacy UI
• It is an easy-to-use but powerful tool that is also very popular. Jameson Loop even has a whole website dedicated to building the file.
• It is a way to handle vast array of settings and features Core makes possible
• It's seems good balance between powers & limitations of the UI and the RPC console

Suggestion: Given the potential to mess up things by users who don't know what they are doing, bitcoin.conf can be located in the Developer Options.

Thoughts? Can provide mockiup if required.

edit: added last bullet point. How do folks feel about including it in the V1 milestone/MVP?

[yashrajd]

Track this in the correct repo https://github.com/BitcoinDesign/Bitcoin-Core-App/issues/52