Start DM on first message (#8612)

res/css/_components.pcss

@@ -38,6 +38,7 @@
 @import "./structures/_GenericErrorPage.pcss";
 @import "./structures/_HeaderButtons.pcss";
 @import "./structures/_HomePage.pcss";
+@import "./structures/_LargeLoader.pcss";
 @import "./structures/_LeftPanel.pcss";
 @import "./structures/_MainSplit.pcss";
 @import "./structures/_MatrixChat.pcss";

res/css/structures/_LargeLoader.pcss

@@ -0,0 +1,37 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+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_LargeLoader {
+    align-items: center;
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+
+    .mx_Spinner {
+        flex: unset;
+        height: auto;
+        margin-bottom: 32px;
+        margin-top: 33vh;
+    }
+
+    .mx_LargeLoader_text {
+        font-size: 24px;
+        font-weight: 600;
+        padding: 0 16px;
+        position: relative;
+        text-align: center;
+    }
+}

res/css/structures/_RoomView.pcss

@@ -32,6 +32,13 @@ limitations under the License.
     position: relative;
 }
 
+.mx_MainSplit_timeline,
+.mx_RoomView--local {
+    .mx_MessageComposer_wrapper {
+        margin: $spacing-8 $spacing-16;
+    }
+}
+
 .mx_RoomView_auxPanel {
     min-width: 0px;
     width: 100%;
@@ -183,6 +190,10 @@ limitations under the License.
     box-sizing: border-box;
 }
 
+.mx_RoomView--local .mx_ScrollPanel .mx_RoomView_MessageList {
+    justify-content: center;
+}
+
 .mx_RoomView_MessageList li {
     clear: both;
 }