PLT-3508/PLT-3516/PLT-3558/PLT-3570/PLT-3497 Multiple UI Improvements (#3553)

* PLT-3627 - Fixing spacing in RHS

* PLT-3516 - Fixing errors in backstage

* PLT-3558 - Fixing system console menu on small screens

* PLT-3570 - Fixing account settings sidebar truncating issue

* PLT-3497 - Moving see other themes link

* Removing formatted message import from premade theme chooser

webapp/components/emoji/components/add_emoji.jsx

@@ -277,7 +277,10 @@ export default class AddEmoji extends React.Component {
                         </div>
                         {preview}
                         <div className='backstage-form__footer'>
-                            <FormError error={this.state.error}/>
+                            <FormError
+                                type='backstage'
+                                error={this.state.error}
+                            />
                             <Link
                                 className='btn btn-sm'
                                 to={'/' + this.props.team.name + '/emoji'}