mining: add visual icon/indicator that mining is enabled, visible on all the screens

pages/Mining.qml

@@ -241,6 +241,7 @@ Rectangle {
         updateStatusText()
         startSoloMinerButton.enabled = !walletManager.isMining()
         stopSoloMinerButton.enabled = !startSoloMinerButton.enabled
+        appWindow.isMining = walletManager.isMining()
     }
 
     MoneroComponents.StandardDialog {

pages/Transfer.qml

@@ -660,6 +660,8 @@ Rectangle {
                 // Light wallet is always ready
                 pageRoot.enabled = true;
                 root.warningContent = "";
+                // check if daemon was already mining and add mining logo if true
+                middlePanel.miningView.update();
             }
         }
     }

pages/settings/Settings.qml

@@ -46,6 +46,7 @@ ColumnLayout {
     Clipboard { id: clipboard }
     property bool viewOnly: false
     property int settingsHeight: 900
+    property alias settingsStateViewState: settingsStateView.state
 
     Navbar{}