Update Spanish (es) translation for version 0.5.0.4

[evpo]

Hi @KoiZeroWafflz , I am preparing the next version of EncryptPad. I integrated your original translation from the PR ( https://github.com/evpo/EncryptPad/pull/125 ) in Transifex web site.

I've added a few features in the GUI. There are only 13 untranslated entries at the moment. If you would like to contribute again, please sign up to the transifex web site and I will add you as a translator of Spanish language.

https://app.transifex.com/open-source-4/encryptpad

[KoiZeroWafflz]

Hi @evpo, Thanks for the advice, I will continue to contribute as a translator for Spanish. The request has been sent :))

[evpo]

request accepted, thanks