Add current wallet indicator in "Connect to Dapp" prompt

[eucalyptus-viminalis]

As the title suggest I think this is a much needed feature for Rabby extension.

1. Feature to switch wallets inside of the "Connect to Dapp" prompt
2. Indicator showing the wallet that is about to be connected in the "Connect to Dapp" prompt

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1. As most users operate with multiple wallets, having the option to switch to a different wallet inside of the prompt will increase the UX. Without it, a user would have to remember to first click the extension, switch to the wallet they want to use to connect to the site, return to the site, hit the connect button and then press connect on the prompt.

2. More importantly, there should be an indicator displaying which wallet is about to be connected to the site in the prompt as well.

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As you can see from the below image, the "Connect to Dapp" modal does not show any information about the wallet that is about to be connected to the site: