plugins: give popout customizable header actions

quickshell/Modules/Plugins/PopoutComponent.qml

@@ -9,6 +9,7 @@ Column {
     property string detailsText: ""
     property bool showCloseButton: false
     property var closePopout: null
+    property alias headerActions: headerActionsLoader.sourceComponent
 
     readonly property int headerHeight: popoutHeader.visible ? popoutHeader.height : 0
     readonly property int detailsHeight: popoutDetails.visible ? popoutDetails.implicitHeight : 0
@@ -31,13 +32,21 @@ Column {
             color: Theme.surfaceText
         }
 
+        Row {
+            anchors.right: parent.right
+            anchors.verticalCenter: parent.verticalCenter
+            spacing: Theme.spacingXS
+
+            Loader {
+                id: headerActionsLoader
+                anchors.verticalCenter: parent.verticalCenter
+            }
+
             Rectangle {
                 id: closeButton
                 width: 32
                 height: 32
                 radius: 16
-            anchors.right: parent.right
-            anchors.verticalCenter: parent.verticalCenter
                 color: closeArea.containsMouse ? Theme.errorHover : "transparent"
                 visible: root.showCloseButton
 
@@ -61,6 +70,7 @@ Column {
                 }
             }
         }
+    }
 
     StyledText {
         id: popoutDetails