Broken gateway links on deposit and withdraw page

[abitmore]

Describe the bug

Broken "Pirate" and "Xbts Native Chains" gateway links on the deposit page and the withdraw page.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://develop.bitshares.org
2. Navigate to an account, or login
3. Select default gateway services (as of writing, options are: BlockTrades, ioxbank, Pirate, and Xbts Native Chains)
4. Click on Hamburg Menu - Deposit
5. Select 'BTC'
6. Select a gateway (as of writing, options are: "Pirate" and "Xbts Native Chains")
7. click the "?" icon right to "GATEWAY"
8. See result: the help menu tree shows in the background with no other content
9. Similar issue on the withdraw page

Expected behavior
The correct page appears if it exists; if it does not exist, show an error message indicating that the page does not exist, or maybe do not show the "?" icon at all.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 18.04
• Browser: Chrome
• Version: Latest

Additional context

• The link to the ioxbank gateway help page is correct (select XRP or XLM to see).
• There is a help page for the "xbts" gateway, but neither the link on the deposit nor on the withdraw page is correct.
• The is no help page for the "Pirate" gateway