improve wallet open flow

remove load_wallet from walletDB, route all wallet loading through QEDaemon.
QEDaemon emits walletLoaded and walletRequiresPassword signals. main.qml opens
OpenWallet view when extra user interaction is needed

electrum/gui/qml/components/WalletMainView.qml

@@ -67,5 +67,12 @@ Item {
 
     }
 
+    Connections {
+        target: Daemon
+        function onWalletLoaded() {
+            tabbar.setCurrentIndex(1)
+        }
+    }
+
 }