Change en.json : PLT-3371 (#3825)

* Change en.json : PLT-3371

* Change jsx files for UI text

* Change jsx files for UI text

webapp/components/user_settings/user_settings_general.jsx

@@ -330,7 +330,7 @@ class UserSettingsGeneralTab extends React.Component {
                     <div className='setting-list__hint text-danger'>
                         <FormattedMessage
                             id='user.settings.general.emailHelp2'
-                            defaultMessage='Email has been disabled by your system administrator. No notification emails will be sent until it is enabled.'
+                            defaultMessage='Email has been disabled by your System Administrator. No notification emails will be sent until it is enabled.'
                         />
                     </div>
                 );

webapp/components/user_settings/user_settings_notifications.jsx

@@ -365,7 +365,7 @@ export default class NotificationsTab extends React.Component {
             describe = (
                 <FormattedMessage
                     id='user.settings.push_notification.disabled'
-                    defaultMessage='Disabled by system administrator'
+                    defaultMessage='Disabled by System Administrator'
                 />
             );
         } else {