ErrorBoundary: display Soapbox version

app/soapbox/components/error_boundary.js

@@ -4,6 +4,7 @@ import { FormattedMessage } from 'react-intl';
 
 import Icon from 'soapbox/components/icon';
 import { captureException } from 'soapbox/monitoring';
+import sourceCode from 'soapbox/utils/code';
 
 export default class ErrorBoundary extends React.PureComponent {
 
@@ -87,6 +88,7 @@ export default class ErrorBoundary extends React.PureComponent {
           {browser && <p className='error-boundary__browser'>
             {browser.getBrowserName()} {browser.getBrowserVersion()}
           </p>}
+          <p className='error-boundary__version'>{sourceCode.displayName} {sourceCode.version}</p>
           <p className='help-text'>
             <FormattedMessage
               id='alert.unexpected.help_text'

app/styles/components/error-boundary.scss

@@ -63,6 +63,11 @@
     }
   }
 
+  &__version {
+    font-size: 12px;
+    margin: 6px 0;
+  }
+
   p.help-text {
     text-align: left;
     font-style: italic;