dankbar: fix widget registration during visibility changes

fixes #1956

quickshell/Modals/Changelog/ChangelogModal.qml

@@ -24,6 +24,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: visible = false
+
     FocusScope {
         id: contentFocusScope
         anchors.fill: parent

quickshell/Modals/FileBrowser/FileBrowserModal.qml

@@ -41,6 +41,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: close()
+
     onVisibleChanged: {
         if (visible) {
             if (parentModal && "shouldHaveFocus" in parentModal) {

quickshell/Modals/Greeter/GreeterModal.qml

@@ -93,6 +93,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: visible = false
+
     Process {
         id: cheatsheetProcess
         running: false

quickshell/Modals/PolkitAuthModal.qml

@@ -32,6 +32,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: hide()
+
     onVisibleChanged: {
         if (visible) {
             Qt.callLater(focusContent);

quickshell/Modals/Settings/SettingsModal.qml

@@ -92,6 +92,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: hide()
+
     onIsCompactModeChanged: {
         enableAnimations = false;
         if (!isCompactMode) {

quickshell/Modals/WindowRuleModal.qml

@@ -32,6 +32,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: hide()
+
     function resetForm() {
         nameInput.text = "";
         appIdInput.text = "";

quickshell/Modals/WorkspaceRenameModal.qml

@@ -18,6 +18,8 @@ FloatingWindow {
     color: Theme.surfaceContainer
     visible: false
 
+    onClosed: hide()
+
     function show(name) {
         nameInput.text = name;
         visible = true;