UI is confusing for new users. Suggest an onboarding tour plus more help text.

[GusRuss89]

As a first-time user, the UI doesn't immediately make sense to me.

Here are some of my specific issues. All of these could be fixed by adding either some help text or a fly-through tour using something like Bootstrap Tour.

• I was confused about the "Pending Blocks (Waiting for PoW...)" title, so I googled it and found a LOT of other confused people.
• I was also confused when going to "Receive" that there was a field for "Amount" (I had to google this as well to discover that it's optional).
• I can't actually copy my existing receive address from the "Receive" modal.
• "Generate New Account" - what is an account? Should I make a new one every time I want to receive money?
• I can only get a QR code for my account when generating a new one - after that I can't seem to any more.
• Why do the amount fields all say XRB/MRai? Are they different? Am I entering XRB or MRai?
• What is a representative? When would I want to change mine, and what would I change it to?

If you want help with this I could potentially find some time in the coming weeks, but I'm not actually sure I know the answers to these questions well enough to write some supporting help text for them.