Refactor room list in multiple sub components

Also modernize the codebase where possible (e.g use required properties,
reorder properties, fix warnings, don't use Action when not needed)

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

src/qml/Page/RoomList/CollapsedRoomDelegate.qml

@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: 2023 Carl Schwan <carl@carlschwan.eu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import QtQuick 2.15
+import QtQuick.Controls 2.15 as QQC2
+import QtQuick.Layouts 1.15
+import QtQml.Models 2.15
+
+import org.kde.kirigami 2.15 as Kirigami
+import org.kde.kitemmodels 1.0
+
+import org.kde.neochat 1.0
+
+import './' as RoomList
+
+QQC2.ItemDelegate {
+    id: root
+
+    required property var currentRoom
+    required property bool categoryVisible
+    required property string filterText
+    required property string avatar
+    required property string name
+
+    topPadding: Kirigami.Units.largeSpacing
+    leftPadding: Kirigami.Units.largeSpacing
+    rightPadding: Kirigami.Units.largeSpacing
+    bottomPadding: Kirigami.Units.largeSpacing
+
+    width: ListView.view.width
+    height: visible ? ListView.view.width : 0
+
+    visible: root.categoryVisible || filterText.length > 0 || Config.mergeRoomList
+
+    contentItem: Kirigami.Avatar {
+        source: root.avatar ? `image://mxc/${root.avatar}` : ""
+        name: root.name || i18n("No Name")
+
+        sourceSize {
+            width: Kirigami.Units.gridUnit + Kirigami.Units.largeSpacing * 2
+            height: Kirigami.Units.gridUnit + Kirigami.Units.largeSpacing * 2
+        }
+    }
+
+    onClicked: RoomManager.enterRoom(root.currentRoom)
+
+    Keys.onEnterPressed: RoomManager.enterRoom(root.currentRoom)
+    Keys.onReturnPressed: RoomManager.enterRoom(root.currentRoom)
+
+    QQC2.ToolTip.visible: text.length > 0 && hovered
+    QQC2.ToolTip.text: root.name ?? ""
+    QQC2.ToolTip.delay: Kirigami.Units.toolTipDelay
+}