Sulu Release 1.5.21 & 1.6.25

The 1.x series gets two more hotfixes: 1.5.21 and 1.6.25.

Both releases contain an improvement concerning the user API. This API does not return the permissions for each role anymore, because it is not needed in the view where this API is used. This should improve performance and mitigate a crash appearing when there are too many roles in the system.

In addition to that both releases also removed the deprecation of the "WebsiteController::renderStructure" method, because we don't have a replacement plan for it in Sulu 2.0. So it should be safe to use this method until at least Sulu 3.0.

1.6.25 contains a few more bugfixes and improvement and adds a small feature being added by LĂ©opold Baillard's PR. It adds the dimensions of a video in its properties, so that they are available to use in your templates.