ErrorBoundary: improve icons and styles

app/soapbox/components/error_boundary.js

@@ -2,6 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { FormattedMessage } from 'react-intl';
 import { captureException } from 'soapbox/monitoring';
+import Icon from 'soapbox/components/icon';
 
 export default class ErrorBoundary extends React.PureComponent {
 
@@ -67,12 +68,14 @@ export default class ErrorBoundary extends React.PureComponent {
     return (
       <div className='error-boundary'>
         <div>
-          <i className='fa fa-frown-o' aria-hidden='true' />
+          <Icon src={require('@tabler/icons/icons/mood-sad.svg')} className='sad-face' />
           <FormattedMessage id='alert.unexpected.message' defaultMessage='An unexpected error occurred.' />
-          <a href='/' className='return-home'>
-            <i className='fa fa-reply' aria-hidden='true' />&nbsp;
-            <FormattedMessage id='alert.unexpected.return_home' defaultMessage='Return Home' />
-          </a>
+          <div className='return-home'>
+            <a a href='/'>
+              <Icon src={require('@tabler/icons/icons/arrow-back.svg')} />
+              <FormattedMessage id='alert.unexpected.return_home' defaultMessage='Return Home' />
+            </a>
+          </div>
           {errorText && <textarea
             ref={this.setTextareaRef}
             className='error-boundary__component-stack'

app/styles/components/error-boundary.scss

@@ -5,12 +5,29 @@
   text-align: center;
   padding: 10px 10px 80px;
 
-  i.fa.fa-frown-o {
-    display: block;
-    text-align: center;
-    font-size: 70px;
-    margin: 20px 0;
+  * {
+    box-sizing: border-box;
+  }
+
+  ::selection {
+    background-color: #000;
+    color: #fff;
+  }
+
+  .sad-face {
+    width: 70px;
+    height: 70px;
+    margin: 20px auto;
     opacity: 0.5;
+    transition: 0.8s;
+
+    svg {
+      stroke-width: 1.5px;
+    }
+
+    &:hover {
+      transform: rotate(180deg);
+    }
   }
 
   a {
@@ -26,10 +43,23 @@
       color: var(--primary-text-color--faint);
     }
 
-    a.return-home {
-      display: block;
+    .return-home {
+      display: flex;
       margin: 15px auto;
-      text-align: center;
+      justify-content: center;
+      align-items: center;
+
+      a {
+        display: flex;
+        justify-content: center;
+        align-items: center;
+      }
+
+      .svg-icon {
+        width: 18px;
+        height: 18px;
+        margin-right: 5px;
+      }
     }
   }