Devtools Improvements

- Now has tabs setup as more features are added
- First extra tab has basic server info
- Use mobileform to make it look nicer
- For the room data tab allow the room to be changed from within devtools
- For the room data tab allow m.room.member events to be filtered out so other event types can be found easily
- For the room data tab allow viewing room account data

network/neochat#557

src/models/statefiltermodel.h

@@ -0,0 +1,44 @@
+// SPDX-FileCopyrightText: 2022 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#pragma once
+
+#include <QSortFilterProxyModel>
+
+/**
+ * @class StateFilterModel
+ *
+ * This class creates a custom QSortFilterProxyModel for filtering a list of state events.
+ * Event types can be filtered out by adding them to m_stateEventTypesFiltered.
+ */
+class StateFilterModel : public QSortFilterProxyModel
+{
+    Q_OBJECT
+
+public:
+    /**
+     * @brief Custom filter function checking if an event type has been filtered out.
+     *
+     * The filter rejects a row if the state event type has been added to m_stateEventTypesFiltered.
+     *
+     * @sa m_stateEventTypesFiltered
+     */
+    bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const override;
+
+    /**
+     * @brief Add an event type to m_stateEventTypesFiltered.
+     *
+     * @sa m_stateEventTypesFiltered
+     */
+    Q_INVOKABLE void addStateEventTypeFiltered(const QString &stateEventType);
+
+    /**
+     * @brief Remove an event type from m_stateEventTypesFiltered.
+     *
+     * @sa m_stateEventTypesFiltered
+     */
+    Q_INVOKABLE void removeStateEventTypeFiltered(const QString &stateEventType);
+
+private:
+    QStringList m_stateEventTypesFiltered;
+};