GODT-1272: Ultimate fix for MacOS transparency

internal/frontend/qml/Bridge_test.qml

@@ -43,7 +43,12 @@ Window {
     flags   : Qt.Window | Qt.Dialog
     visible : true
     title   : "Bridge Test GUI"
-    color   : colorScheme.background_norm
+
+    // This is needed because on MacOS if first window shown is not transparent -
+    // all other windows of application will not have transparent background (black
+    // instead of transparency). In our case that mean that if BridgeTest will be
+    // shown before StatusWindow - StatusWindow will not have transparent corners.
+    color: "transparent"
 
     function getCursorPos() {
         return BridgePreview.getCursorPos()
@@ -272,12 +277,20 @@ Window {
         }
     }
 
-    StackLayout {
+    Rectangle {
+        color: root.colorScheme.background_norm
+
         anchors.top: tabBar.bottom
         anchors.left: parent.left
         anchors.right: parent.right
         anchors.bottom: parent.bottom
 
+        implicitHeight: children[0].contentHeight + children[0].anchors.topMargin + children[0].anchors.bottomMargin
+        implicitWidth: children[0].contentWidth + children[0].anchors.leftMargin + children[0].anchors.rightMargin
+
+        StackLayout {
+            anchors.fill: parent
+
             currentIndex: tabBar.currentIndex
 
             anchors.margins: 10
@@ -634,6 +647,7 @@ Window {
                 }
             }
         }
+    }
 
     property Bridge bridge
 

internal/frontend/qml/MainWindow.qml

@@ -41,6 +41,12 @@ ApplicationWindow {
     property var backend
     property var notifications
 
+    // This is needed because on MacOS if first window shown is not transparent -
+    // all other windows of application will not have transparent background (black
+    // instead of transparency). In our case that mean that if MainWindow will be
+    // shown before StatusWindow - StatusWindow will not have transparent corners.
+    color: "transparent"
+
     // show Setup Guide on every new user
     Connections {
         target: root.backend.users