Use libQuotient 0.9.2 facilities

...instead of having them in Quaternion.

client/logindialog.h

@@ -20,18 +20,6 @@ class AccountSettings;
 class AccountRegistry;
 }
 
-#if QT_VERSION_MAJOR > 5
-using DeleteLater = QScopedPointerDeleteLater;
-#else
-struct DeleteLater {
-    void operator()(Quotient::Connection* ptr)
-    {
-        if (ptr)
-            ptr->deleteLater();
-    }
-};
-#endif
-
 static const auto E2eeEnabledSetting = QStringLiteral("enable_e2ee");
 
 class LoginDialog : public Dialog {
@@ -66,5 +54,5 @@ private slots:
     QLineEdit* serverEdit;
     QCheckBox* saveTokenCheck;
 
-    std::unique_ptr<Quotient::Connection, DeleteLater> m_connection;
+    Quotient::QObjectHolder<Quotient::Connection> m_connection;
 };

client/models/orderbytag.cpp

@@ -8,6 +8,7 @@
 
 #include "roomlistmodel.h"
 
+#include <Quotient/ranges_extras.h>
 #include <Quotient/settings.h>
 
 static const auto Invite = RoomGroup::SystemPrefix + "invite";
@@ -60,26 +61,16 @@ QString captionToTag(const QString& caption)
     // clang-format on
 }
 
-template <typename LT, typename VT>
-inline auto findIndex(const QList<LT>& list, const VT& value)
-{
-    // Using std::find() instead of indexOf() so that not found keys were
-    // naturally sorted after found ones (index == list.end() - list.begin()
-    // is more than any index in the list, while index == -1 is less).
-    return std::find(list.begin(), list.end(), value) - list.begin();
-}
-
 auto findIndexWithWildcards(const QStringList& list, const QString& value)
 {
     if (list.empty() || value.isEmpty())
         return list.size();
 
-    auto i = findIndex(list, value);
+    auto i = Quotient::findIndex(list, value);
     // Try namespace groupings (".*" in the list), from right to left
-    for (int dotPos = 0;
-         i == list.size() && (dotPos = value.lastIndexOf('.', --dotPos)) != -1;)
-    {
-        i = findIndex(list, value.left(dotPos + 1) + '*');
+    for (QStringList::size_type dotPos = 0;
+         i == list.size() && (dotPos = value.lastIndexOf('.', --dotPos)) != -1;) {
+        i = Quotient::findIndex(list, value.left(dotPos + 1) + '*');
     }
     return i;
 }

client/models/userlistmodel.cpp

@@ -19,11 +19,10 @@
 #include <QtWidgets/QAbstractItemView>
 
 #include <Quotient/connection.h>
+#include <Quotient/ranges_extras.h>
 #include <Quotient/room.h>
 #include <Quotient/user.h>
 
-#include <ranges>
-
 UserListModel::UserListModel(QAbstractItemView* parent)
     : QAbstractListModel(parent), m_currentRoom(nullptr)
 { }
@@ -162,11 +161,9 @@ void UserListModel::filter(const QString& filterString)
     QElapsedTimer et; et.start();
 
     beginResetModel();
-    // TODO: use std::ranges::to() once it's available from all stdlibs Quotient builds with
-    auto filteredMembersView =
+    auto filteredMembers = Quotient::rangeTo<QList>(
         std::views::filter(m_currentRoom->joinedMembers(),
-                           Quotient::memberMatcher(filterString, Qt::CaseInsensitive));
-    QList filteredMembers(filteredMembersView.begin(), filteredMembersView.end());
+                           Quotient::memberMatcher(filterString, Qt::CaseInsensitive)));
     std::ranges::sort(filteredMembers, Quotient::MemberSorter());
     const auto sortedIds = std::views::transform(filteredMembers, &RoomMember::id);
 #if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)