CSS for adding rooms to a group with visibility

Also, make chat invite error looks slightly more normal

src/skins/vector/css/_components.scss

@@ -22,6 +22,7 @@
 @import "./matrix-react-sdk/views/dialogs/_CreateGroupDialog.scss";
 @import "./matrix-react-sdk/views/dialogs/_CreateRoomDialog.scss";
 @import "./matrix-react-sdk/views/dialogs/_EncryptedEventDialog.scss";
+@import "./matrix-react-sdk/views/dialogs/_GroupAddressPicker.scss";
 @import "./matrix-react-sdk/views/dialogs/_QuestionDialog.scss";
 @import "./matrix-react-sdk/views/dialogs/_SetMxIdDialog.scss";
 @import "./matrix-react-sdk/views/dialogs/_UnknownDeviceDialog.scss";

src/skins/vector/css/matrix-react-sdk/views/dialogs/_ChatInviteDialog.scss

@@ -60,9 +60,8 @@ limitations under the License.
 }
 
 .mx_ChatInviteDialog_error {
-    position: absolute;
+    margin-top: 10px;
     color: $warning-color;
-    line-height: 36px;
 }
 
 .mx_ChatInviteDialog_cancel {

src/skins/vector/css/matrix-react-sdk/views/dialogs/_GroupAddressPicker.scss

@@ -0,0 +1,25 @@
+/*
+Copyright 2017 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_GroupAddressPicker_checkboxContainer{
+    margin-top: 10px;
+    display: flex;
+}
+
+.mx_GroupAddressPicker_checkboxContainer input[type="checkbox"] {
+    /* Stop flex from shrinking the checkbox */
+    width: 20px;
+}