Make sidebar collapsible

src/neochatconfig.kcfg

@@ -41,6 +41,9 @@
       <label>"Show your messages on the right</label>
       <default>true</default>
     </entry>
+    <entry name="RoomListPageWidth" type="int">
+      <default>-1</default>
+    </entry>
   </group>
   <group name="Timeline">
     <entry name="ShowAvatarInTimeline" type="bool">

src/roomlistmodel.cpp

@@ -432,6 +432,24 @@ QString RoomListModel::categoryName(int section)
     }
 }
 
+QString RoomListModel::categoryIconName(int section)
+{
+    switch (section) {
+    case 1:
+        return QStringLiteral("user-invisible");
+    case 2:
+        return QStringLiteral("favorite");
+    case 3:
+        return QStringLiteral("dialog-messages");
+    case 4:
+        return QStringLiteral("group");
+    case 5:
+        return QStringLiteral("object-order-lower");
+    default:
+        return QStringLiteral("tools-report-bug");
+    }
+}
+
 void RoomListModel::setCategoryVisible(int category, bool visible)
 {
     beginResetModel();

src/roomlistmodel.h

@@ -69,6 +69,7 @@ public:
     [[nodiscard]] QHash<int, QByteArray> roleNames() const override;
 
     Q_INVOKABLE [[nodiscard]] static QString categoryName(int section);
+    Q_INVOKABLE [[nodiscard]] static QString categoryIconName(int section);
     Q_INVOKABLE void setCategoryVisible(int category, bool visible);
     Q_INVOKABLE [[nodiscard]] bool categoryVisible(int category) const;