fix(warnings): Remove warnings on login screen

Fixes: #8293

ui/StatusQ/src/StatusQ/Controls/StatusPinInput.qml

@@ -128,9 +128,13 @@ Item {
     */
     function statesInitialization() {
         d.currentPinIndex = 0
-        repeater.itemAt(d.currentPinIndex).innerState = "NEXT"
+        let item = repeater.itemAt(d.currentPinIndex)
+        if (item)
+            item.innerState = "NEXT"
         for (var i = 1; i < root.pinLen; i++) {
-            repeater.itemAt(i).innerState = "EMPTY"
+            let item = repeater.itemAt(i)
+            if (item)
+                item.innerState = "EMPTY"
         }
         inputText.text = ""
     }

ui/imports/utils/Global.qml

@@ -12,8 +12,8 @@ QtObject {
     property int settingsSubsection: Constants.settingsSubsection.profile
 
     property var globalUtilsInst: typeof globalUtils !== "undefined" ? globalUtils : null
-    property var mainModuleInst
     property var userProfile
+    property var mainModuleInst: typeof mainModule !== "undefined" ? mainModule : null
     property var privacyModuleInst
     property var toastMessage
     property var pinnedMessagesPopup

ui/main.qml

@@ -126,7 +126,7 @@ StatusWindow {
 
     Connections {
         id: windowsOsNotificationsConnection
-        enabled: false
+        enabled: Qt.platform.os === Constants.windows
         target: Global.mainModuleInst
         function onDisplayWindowsOsNotification(title, message) {
             systemTray.showMessage(title, message)
@@ -155,9 +155,6 @@ StatusWindow {
                 // We set main module to the Global singleton once user is logged in and we move to the main app.
                 Global.mainModuleInst = mainModule
                 Global.userProfile = userProfile
-                if (Qt.platform.os === Constants.windows) {
-                    windowsOsNotificationsConnection.enabled = true
-                }
 
                 loader.sourceComponent = app