Partially revert 8037fb76fc to fix mouse polling issues on Windows

app/gui/StreamSegue.qml

@@ -15,6 +15,11 @@ Item {
 
     anchors.fill: parent
 
+    // The StackView will trigger a visibility change when
+    // we're pushed onto it, causing our onVisibleChanged
+    // routine to run, but only if we start as invisible
+    visible: false
+
     function stageStarting(stage)
     {
         // Update the spinner text
@@ -100,34 +105,39 @@ Item {
         id: gamepadKeyNav
     }
 
-    StackView.onActivated: {
+    StackView.onDeactivating: {
-        // Hide the toolbar before we start loading
+        // Show the toolbar again when popped off the stack
-        toolBar.visible = false
+        toolBar.visible = true
-
-        // Set the hint text. We do this here rather than
-        // in the hintText control itself to synchronize
-        // with Session.exec() which requires no concurrent
-        // gamepad usage.
-        hintText.text = gamepadKeyNav.getConnectedGamepads() > 0 ?
-                  "Tip: Press Start+Select+L1+R1 to disconnect your session" :
-                  "Tip: Press Ctrl+Alt+Shift+Q to disconnect your session"
-
-        // Hook up our signals
-        session.stageStarting.connect(stageStarting)
-        session.stageFailed.connect(stageFailed)
-        session.connectionStarted.connect(connectionStarted)
-        session.displayLaunchError.connect(displayLaunchError)
-        session.displayLaunchWarning.connect(displayLaunchWarning)
-        session.quitStarting.connect(quitStarting)
-        session.sessionFinished.connect(sessionFinished)
-
-        // Run the streaming session to completion
-        session.exec(Screen.virtualX, Screen.virtualY)
     }
 
-    StackView.onDeactivating: {
+    // !!! Changing this to use the StackView activation callbacks
-        // Show the toolbar again
+    // causes our mouse polling rate to drop significantly on
-        toolBar.visible = true
+    // Windows for some reason !!!
+    onVisibleChanged: {
+        if (visible) {
+            // Hide the toolbar before we start loading
+            toolBar.visible = false
+
+            // Set the hint text. We do this here rather than
+            // in the hintText control itself to synchronize
+            // with Session.exec() which requires no concurrent
+            // gamepad usage.
+            hintText.text = gamepadKeyNav.getConnectedGamepads() > 0 ?
+                      "Tip: Press Start+Select+L1+R1 to disconnect your session" :
+                      "Tip: Press Ctrl+Alt+Shift+Q to disconnect your session"
+
+            // Hook up our signals
+            session.stageStarting.connect(stageStarting)
+            session.stageFailed.connect(stageFailed)
+            session.connectionStarted.connect(connectionStarted)
+            session.displayLaunchError.connect(displayLaunchError)
+            session.displayLaunchWarning.connect(displayLaunchWarning)
+            session.quitStarting.connect(quitStarting)
+            session.sessionFinished.connect(sessionFinished)
+
+            // Run the streaming session to completion
+            session.exec(Screen.virtualX, Screen.virtualY)
+        }
     }
 
     Row {