Clipboard issues

[erdemyerebasmaz]

This PR addresses

• 1286

Changelist:

• Remove redundant isLightningAddress check for clipboard item on listenLNUrl 0fa706dc539de8e1e13997d714348c8a90a650bc
• Don't check if account is connected or not before displaying payment request dialog edab5e4f98d7d4ce2535ef98fcafecaebbf1ed3d
• Wrap _listenPaymentRequests handler with try/catch block 62de82df2f99f8a01badeaf43b0cf144a9eb611c
• Reset _handlingRequest on error 97f4ccb9c8e8db6d4a9df45781f34c869a2f7a4d