[Linux] Add reopen to tray options, enhance app tray, add ability to detect duplicate app instances, prevent duplicate app instances, and allow for original instance to be brought to front using the sockets

linux/Main.qml

@@ -9,9 +9,33 @@ ApplicationWindow {
     width: 400
     height: 300
     title: "AirPods Settings"
+    objectName: "mainWindowObject"
 
     onClosing: mainWindow.visible = false
 
+    function reopen(pageToLoad) {
+        if (pageToLoad == "settings")
+        {
+            if (stackView.depth == 1)
+            {
+                stackView.push(settingsPage)
+            }
+        }
+        else
+        {
+            if (stackView.depth > 1)
+            {
+                stackView.pop()
+            }
+        }
+
+        if (!mainWindow.visible) {
+            mainWindow.visible = true
+        }
+        raise()
+        requestActivate()
+    }
+
     // Mouse area for handling back/forward navigation
     MouseArea {
         anchors.fill: parent