Rename themes -> flavours ? ?

app/javascript/flavours/glitch/features/local_settings/navigation/item/index.js

@@ -0,0 +1,69 @@
+//  Package imports
+import React from 'react';
+import PropTypes from 'prop-types';
+import classNames from 'classnames';
+
+//  Stylesheet imports
+import './style.scss';
+
+//  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+
+export default class LocalSettingsPage extends React.PureComponent {
+
+  static propTypes = {
+    active: PropTypes.bool,
+    className: PropTypes.string,
+    href: PropTypes.string,
+    icon: PropTypes.string,
+    index: PropTypes.number.isRequired,
+    onNavigate: PropTypes.func,
+    title: PropTypes.string,
+  };
+
+  handleClick = (e) => {
+    const { index, onNavigate } = this.props;
+    if (onNavigate) {
+      onNavigate(index);
+      e.preventDefault();
+    }
+  }
+
+  render () {
+    const { handleClick } = this;
+    const {
+      active,
+      className,
+      href,
+      icon,
+      onNavigate,
+      title,
+    } = this.props;
+
+    const finalClassName = classNames('glitch', 'local-settings__navigation__item', {
+      active,
+    }, className);
+
+    const iconElem = icon ? <i className={`fa fa-fw fa-${icon}`} /> : null;
+
+    if (href) return (
+      <a
+        href={href}
+        className={finalClassName}
+      >
+        {iconElem} {title}
+      </a>
+    );
+    else if (onNavigate) return (
+      <a
+        onClick={handleClick}
+        role='button'
+        tabIndex='0'
+        className={finalClassName}
+      >
+        {iconElem} {title}
+      </a>
+    );
+    else return null;
+  }
+
+}

app/javascript/flavours/glitch/features/local_settings/navigation/item/style.scss

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+@import 'styles/mastodon/variables';
+
+.glitch.local-settings__navigation__item {
+  display: block;
+  padding: 15px 20px;
+  color: inherit;
+  background: $primary-text-color;
+  border-bottom: 1px $ui-primary-color solid;
+  cursor: pointer;
+  text-decoration: none;
+  outline: none;
+  transition: background .3s;
+
+  &:hover {
+    background: $ui-secondary-color;
+  }
+
+  &.active {
+    background: $ui-highlight-color;
+    color: $primary-text-color;
+  }
+
+  &.close, &.close:hover {
+    background: $error-value-color;
+    color: $primary-text-color;
+  }
+}