sidebar.php | spanish (Menu MetaGer) ressources/lang/es

Problem: Two of the used translations ("Formulario de afiliación SUMA-EV" & "Comprar en tiendas que patrocinan a MetaGer") are too long and use 2 lines in the main menu therefore. Only the desktop version is affected.

Solution: These should be shortened to e.g. "Afiliación SUMA-EV" & "Comprar y promover". I would have done this by myself but I don't know if the words are right.