Simplify UI code.

qml/form/RoomForm.qml

@@ -2,7 +2,6 @@ import QtQuick 2.9
 import QtQuick.Controls 2.2
 import QtQuick.Layouts 1.3
 import QtQuick.Controls.Material 2.2
-import QtGraphicalEffects 1.0
 import Spectral 0.1
 import Spectral.Settings 0.1
 import SortFilterProxyModel 0.2
@@ -31,11 +30,7 @@ Item {
         room: currentRoom
     }
 
-    Control {
+    Label {
-        anchors.fill: parent
-        padding: 0
-
-        background: Label {
         anchors.centerIn: parent
         visible: !currentRoom
         text: "Please choose a room."
@@ -129,9 +124,9 @@ Item {
                 spacing: 8
 
                 boundsBehavior: Flickable.DragOverBounds
-                    flickDeceleration: 4096
+                //                    flickDeceleration: 4096
 
-                    cacheBuffer: 200
+                //                    cacheBuffer: 200
 
                 model: SortFilterProxyModel {
                     id: sortedRoomListModel
@@ -515,5 +510,4 @@ Item {
             }
         }
     }
-    }
 }