Delete groups (legacy communities system) (#8027)

* Remove deprecated feature_communities_v2_prototypes

* Update _components

* i18n

* delint

* Cut out a bit more dead code

* Carve into legacy components

* Carve into mostly the room list code

* Carve into instances of "groupId"

* Carve out more of what comes up with "groups"

* Carve out some settings

* ignore related groups state

* Remove instances of spacesEnabled

* Fix some obvious issues

* Remove now-unused css

* Fix variable naming for legacy components

* Update i18n

* Misc cleanup from manual review

* Update snapshot for changed flag

* Appease linters

* rethemedex

* Remove now-unused AddressPickerDialog

* Make ConfirmUserActionDialog's member a required prop

* Remove useless override from RightPanelStore

* Remove extraneous CSS

* Update i18n

* Demo: "Communities are now Spaces" landing page

* Restore linkify for group IDs

* Demo: Dialog on click for communities->spaces notice

* i18n for demos

* i18n post-merge

* Update copy

* Appease the linter

* Post-merge cleanup

* Re-add spaces_learn_more_url to the new SdkConfig place

* Round 1 of post-merge fixes

* i18n

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

res/css/views/context_menus/_TagTileContextMenu.scss

@@ -1,67 +0,0 @@
-/*
-Copyright 2018 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_TagTileContextMenu_item {
-    padding: 8px;
-    padding-right: 20px;
-    cursor: pointer;
-    white-space: nowrap;
-    display: flex;
-    align-items: center;
-    line-height: $font-16px;
-}
-
-.mx_TagTileContextMenu_item::before {
-    content: '';
-    height: 15px;
-    width: 15px;
-    background-color: currentColor;
-    mask-repeat: no-repeat;
-    mask-size: contain;
-    margin-right: 8px;
-}
-
-.mx_TagTileContextMenu_viewCommunity::before {
-    mask-image: url('$(res)/img/element-icons/view-community.svg');
-}
-
-.mx_TagTileContextMenu_moveUp::before {
-    transform: rotate(180deg);
-    mask-image: url('$(res)/img/feather-customised/chevron-down.svg');
-}
-
-.mx_TagTileContextMenu_moveDown::before {
-    mask-image: url('$(res)/img/feather-customised/chevron-down.svg');
-}
-
-.mx_TagTileContextMenu_hideCommunity::before {
-    mask-image: url('$(res)/img/element-icons/hide.svg');
-}
-
-.mx_TagTileContextMenu_createSpace::before {
-    mask-image: url('$(res)/img/element-icons/message/fwd.svg');
-}
-
-.mx_TagTileContextMenu_separator {
-    margin-top: 0;
-    margin-bottom: 0;
-    border-bottom-style: none;
-    border-left-style: none;
-    border-right-style: none;
-    border-top-style: solid;
-    border-top-width: 1px;
-    border-color: $menu-border-color;
-}