New notification cleaning mode (#89)

This PR adds a new notification cleaning mode, super perfectly tuned for accessibility, and removes the previous notification cleaning functionality as it's now redundant.

* w.i.p. notif clearing mode

* Better CSS for selected notification and shorter text if Stretch is off

* wip for rebase ~

* all working in notif clearing mode, except the actual removal

* bulk delete route for piggo

* cleaning + refactor. endpoint gives 422 for some reason

* formatting

* use the right route

* fix broken destroy_multiple

* load more notifs after succ cleaning

* satisfy eslint

* Removed CSS for the old notif delete button

* Tabindex=0 is mandatory

In order to make it possible to tab to this element you must have tab index = 0. Removing this violates WCAG and makes it impossible to use the interface without good eyesight and a mouse. So nobody with certain mobility impairments, vision impairments, or brain injuries would be able to use this feature if you don't have tabindex=0

* Corrected aria-label

Previous label implied a different behavior from what actually happens

* aria role localization & made the overlay behave like a checkbox

* checkboxes css and better contrast

* color tuning for the notif overlay

* fanceh checkboxes etc and nice backgrounds

* SHUT UP TRAVIS

app/javascript/mastodon/features/notifications/index.js

@@ -4,7 +4,10 @@ import PropTypes from 'prop-types';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import Column from '../../components/column';
 import ColumnHeader from '../../components/column_header';
-import { expandNotifications, scrollTopNotifications } from '../../actions/notifications';
+import {
+  expandNotifications,
+  scrollTopNotifications,
+} from '../../actions/notifications';
 import { addColumn, removeColumn, moveColumn } from '../../actions/columns';
 import NotificationContainer from '../../../glitch/components/notification/container';
 import { ScrollContainer } from 'react-router-scroll';
@@ -26,9 +29,11 @@ const getNotifications = createSelector([
 
 const mapStateToProps = state => ({
   notifications: getNotifications(state),
+  localSettings:  state.get('local_settings'),
   isLoading: state.getIn(['notifications', 'isLoading'], true),
   isUnread: state.getIn(['notifications', 'unread']) > 0,
   hasMore: !!state.getIn(['notifications', 'next']),
+  notifCleaningActive: state.getIn(['notifications', 'cleaningMode']),
 });
 
 @connect(mapStateToProps)
@@ -45,6 +50,8 @@ export default class Notifications extends React.PureComponent {
     isUnread: PropTypes.bool,
     multiColumn: PropTypes.bool,
     hasMore: PropTypes.bool,
+    localSettings: ImmutablePropTypes.map,
+    notifCleaningActive: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -164,7 +171,9 @@ export default class Notifications extends React.PureComponent {
     this.scrollableArea = scrollableArea;
 
     return (
-      <Column ref={this.setColumnRef}>
+      <Column
+        ref={this.setColumnRef}
+      >
         <ColumnHeader
           icon='bell'
           active={isUnread}
@@ -174,6 +183,9 @@ export default class Notifications extends React.PureComponent {
           onClick={this.handleHeaderClick}
           pinned={pinned}
           multiColumn={multiColumn}
+          localSettings={this.props.localSettings}
+          notifCleaning
+          notifCleaningActive={this.props.notifCleaningActive} // this is used to toggle the header text
         >
           <ColumnSettingsContainer />
         </ColumnHeader>