Change report modal to include category selection in web UI (#17565)

* Change report modal to include category selection in web UI

* Various fixes and improvements

- Change thank you text to be different based on category
- Change starting headline to be different for account and status reports
- Change toggle components to have a checkmark when checked
- Fix report dialog being cut off on small screens
- Fix thank you screen offering mute or block if already muted or blocked
- Refactor toggle components in report dialog into one component

* Change wording on final screen

* Change checkboxes to be square when multiple options are possible

app/javascript/mastodon/features/report/rules.js

@@ -0,0 +1,64 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import { connect } from 'react-redux';
+import { FormattedMessage } from 'react-intl';
+import Button from 'mastodon/components/button';
+import Option from './components/option';
+
+const mapStateToProps = state => ({
+  rules: state.get('rules'),
+});
+
+export default @connect(mapStateToProps)
+class Rules extends React.PureComponent {
+
+  static propTypes = {
+    onNextStep: PropTypes.func.isRequired,
+    rules: ImmutablePropTypes.list,
+    selectedRuleIds: ImmutablePropTypes.set.isRequired,
+    onToggle: PropTypes.func.isRequired,
+  };
+
+  handleNextClick = () => {
+    const { onNextStep } = this.props;
+    onNextStep('statuses');
+  };
+
+  handleRulesToggle = (value, checked) => {
+    const { onToggle } = this.props;
+    onToggle(value, checked);
+  };
+
+  render () {
+    const { rules, selectedRuleIds } = this.props;
+
+    return (
+      <React.Fragment>
+        <h3 className='report-dialog-modal__title'><FormattedMessage id='report.rules.title' defaultMessage='Which rules are being violated?' /></h3>
+        <p className='report-dialog-modal__lead'><FormattedMessage id='report.rules.subtitle' defaultMessage='Select all that apply' /></p>
+
+        <div>
+          {rules.map(item => (
+            <Option
+              key={item.get('id')}
+              name='rule_ids'
+              value={item.get('id')}
+              checked={selectedRuleIds.includes(item.get('id'))}
+              onToggle={this.handleRulesToggle}
+              label={item.get('text')}
+              multiple
+            />
+          ))}
+        </div>
+
+        <div className='flex-spacer' />
+
+        <div className='report-dialog-modal__actions'>
+          <Button onClick={this.handleNextClick} disabled={selectedRuleIds.size < 1}><FormattedMessage id='report.next' defaultMessage='Next' /></Button>
+        </div>
+      </React.Fragment>
+    );
+  }
+
+}