Always open the user details dialog in the focused window

This fixes some odd UX where you tap on someone's user in a search or
pinned messages window, but it opens in the NeoChat main window instead.

Fixes #681

src/qml/Main.qml

@@ -325,11 +325,13 @@ Kirigami.ApplicationWindow {
         })
     }
     function showUserDetail(user, room) {
-        Qt.createComponent("org.kde.neochat", "UserDetailDialog").createObject(root.QQC2.ApplicationWindow.window, {
+        const dialog = Qt.createComponent("org.kde.neochat", "UserDetailDialog").createObject(root, {
             room: room,
             user: user,
-            connection: root.connection
-        }).open();
+            connection: root.connection,
+        });
+        dialog.parent = QmlUtils.focusedWindowItem(); // Kirigami Dialogs overwrite the parent, so we need to set it again
+        dialog.open();
     }
 
     function load() {

src/utils.cpp

@@ -13,6 +13,7 @@
 #include <Quotient/connection.h>
 
 #include <QJsonDocument>
+#include <QQuickWindow>
 
 using namespace Quotient;
 
@@ -37,6 +38,16 @@ QColor QmlUtils::getUserColor(qreal hueF)
     return QColor::fromHslF(hueF, 1, -0.7 * lightness + 0.9, 1);
 }
 
+QQuickItem *QmlUtils::focusedWindowItem()
+{
+    const auto window = qobject_cast<QQuickWindow *>(QGuiApplication::focusWindow());
+    if (window) {
+        return window->contentItem();
+    } else {
+        return nullptr;
+    }
+}
+
 bool Utils::isEmoji(const QString &text)
 {
 #ifdef HAVE_ICU

src/utils.h

@@ -7,6 +7,7 @@
 #include <QGuiApplication>
 #include <QPalette>
 #include <QQmlEngine>
+#include <QQuickItem>
 #include <QRegularExpression>
 
 #include <Quotient/user.h>
@@ -36,6 +37,7 @@ public:
     Q_INVOKABLE bool isValidJson(const QByteArray &json);
     Q_INVOKABLE QString escapeString(const QString &string);
     Q_INVOKABLE QColor getUserColor(qreal hueF);
+    Q_INVOKABLE QQuickItem *focusedWindowItem();
 
 private:
     QmlUtils() = default;