Improve WalletConnect flow

WalletConnect

Invision prototype:
https://invis.io/VR1020SDDJCK#/443502490_01_WalletConnect_Wallet

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1. Update the request to connect. It should look almost the same as Actionsheet for sending funds. So slide in from the bottom.

Zeplin: "Scanning to connect"
https://zpl.io/VDPnPQv

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2. Make a new, virtual token as a representation of WalletConnect. Currently, you can access WalletConnect through the Settings tab. Keep it. But on the top, please add a virtual token - you can use iOS as a refernce @hboon did it really nice. If you are not connected to any dapp, a virtual token should disappear from the wallet.

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3. Update the screen of the connected dapp. We have a logo at the top (please find the library I created with 100 HQ icons https://zpl.io/2jgwg14)

Zeplin: Virtual Token
https://zpl.io/agRNRMQ

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4. Keep the WalleConnect in Settings. So you will have two ways to access WalletConnect. You can launch a scanner right from the wallet (top right icon), or you can open Settings, go to WalletConnect.

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5. We can stay consistent with all requests, modals etc. They should look like a payment actionsheet you made recently.

Zeplin: Modals
https://zpl.io/b6GvnJj