widgets: fix dropdown/icon picker referencing a dead window

port 1.5

(cherry picked from commit 52123458c7)

quickshell/Modals/Clipboard/ClipboardEditor.qml

@@ -397,7 +397,7 @@ Item {
 
         Popup {
             id: saveMenu
-            parent: Overlay.overlay
+            parent: root.Overlay.overlay
             padding: Theme.spacingM
             modal: true
             dim: false

quickshell/Modals/DankLauncherV2/SectionHeader.qml

@@ -147,7 +147,7 @@ Rectangle {
 
             Popup {
                 id: categoryPopup
-                parent: Overlay.overlay
+                parent: categoryChip.Overlay.overlay
                 width: Math.max(categoryChip.width, 180)
                 padding: 0
                 modal: true

quickshell/Widgets/DankDropdown.qml

@@ -305,7 +305,7 @@ Item {
 
         onClosed: root.menuOpen = false
 
-        parent: Overlay.overlay
+        parent: root.Overlay.overlay
         width: root.popupWidth === -1 ? undefined : (root.popupWidth > 0 ? root.popupWidth : (dropdown.width + root.popupWidthOffset))
         height: {
             let h = root.enableFuzzySearch ? 54 : 0;

quickshell/Widgets/DankIconPicker.qml

@@ -118,7 +118,7 @@ Rectangle {
     Popup {
         id: iconPopup
 
-        parent: Overlay.overlay
+        parent: root.Overlay.overlay
         width: 320
         height: Math.min(500, dropdownContent.implicitHeight + 32)
         padding: 0