first impl of new scrolling, still a bit broken

res/css/structures/_ScrollPanel.scss

@@ -0,0 +1,26 @@
+/*
+Copyright 2019 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_ScrollPanel {
+
+    .mx_RoomView_MessageList {
+        position: relative;
+        display: flex;
+        flex-direction: column;
+        justify-content: flex-end;
+        overflow-y: hidden;
+    }
+}