Add hotkey variants to keyboard shortcuts description

Port 89c6d2bd6b to glitch-soc

app/javascript/flavours/glitch/features/keyboard_shortcuts/index.js

@@ -49,7 +49,7 @@ export default class KeyboardShortcuts extends ImmutablePureComponent {
                 <td><FormattedMessage id='keyboard_shortcuts.boost' defaultMessage='to boost' /></td>
               </tr>
               <tr>
-                <td><kbd>enter</kbd></td>
+                <td><kbd>enter</kbd>, <kbd>o</kbd></td>
                 <td><FormattedMessage id='keyboard_shortcuts.enter' defaultMessage='to open status' /></td>
               </tr>
               <tr>
@@ -57,11 +57,11 @@ export default class KeyboardShortcuts extends ImmutablePureComponent {
                 <td><FormattedMessage id='keyboard_shortcuts.toggle_hidden' defaultMessage='to show/hide text behind CW' /></td>
               </tr>
               <tr>
-                <td><kbd>up</kbd></td>
+                <td><kbd>up</kbd>, <kbd>k</kbd></td>
                 <td><FormattedMessage id='keyboard_shortcuts.up' defaultMessage='to move up in the list' /></td>
               </tr>
               <tr>
-                <td><kbd>down</kbd></td>
+                <td><kbd>down</kbd>, <kbd>j</kbd></td>
                 <td><FormattedMessage id='keyboard_shortcuts.down' defaultMessage='to move down in the list' /></td>
               </tr>
               <tr>