[BUG] mobile wallet connect issues

[ashachaf]

Describe the bug
connect your wallet using "walletconnect" on mobile and link it to metamask.
every transaction i need to confirm on metamask opens the app store instead of the actual option to sign the transaction.

To Reproduce
Steps to reproduce the behavior:
on mobile phone

1. go to app.bancor.network
2. click to connect wallet and select "walletconnect"
3. select to link it to metamask
4. try to deposit BNT
   expected: open the confirm message on the metamask app
   actual: open the app store to download metamask