Add a simple edit dialog for communities

res/css/views/dialogs/_EditCommunityPrototypeDialog.scss

@@ -0,0 +1,77 @@
+/*
+Copyright 2020 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.
+*/
+
+// XXX: many of these styles are shared with the create dialog
+.mx_EditCommunityPrototypeDialog {
+    &.mx_Dialog_fixedWidth {
+        width: 360px;
+    }
+
+    .mx_Dialog_content {
+        margin-bottom: 12px;
+
+        .mx_AccessibleButton.mx_AccessibleButton_kind_primary {
+            display: block;
+            height: 32px;
+            font-size: $font-16px;
+            line-height: 32px;
+        }
+
+        .mx_EditCommunityPrototypeDialog_rowAvatar {
+            display: flex;
+            flex-direction: row;
+            align-items: center;
+        }
+
+        .mx_EditCommunityPrototypeDialog_avatarContainer {
+            margin-top: 20px;
+            margin-bottom: 20px;
+
+            .mx_EditCommunityPrototypeDialog_avatar,
+            .mx_EditCommunityPrototypeDialog_placeholderAvatar {
+                width: 96px;
+                height: 96px;
+                border-radius: 96px;
+            }
+
+            .mx_EditCommunityPrototypeDialog_placeholderAvatar {
+                background-color: #368bd6; // hardcoded for both themes
+
+                &::before {
+                    display: inline-block;
+                    background-color: #fff; // hardcoded because the background is
+                    mask-repeat: no-repeat;
+                    mask-size: 96px;
+                    width: 96px;
+                    height: 96px;
+                    mask-position: center;
+                    content: '';
+                    vertical-align: middle;
+                    mask-image: url('$(res)/img/element-icons/add-photo.svg');
+                }
+            }
+        }
+
+        .mx_EditCommunityPrototypeDialog_tip {
+            margin-left: 20px;
+
+            & > b, & > span {
+                display: block;
+                color: $muted-fg-color;
+            }
+        }
+    }
+}