Spanish translation updates:
- Adds missing translations (extension-description-store info, missing strings.
- Major proofread/editing:
- Rewrites in order to make the texts flow more naturally in Spanish.
- The extension name is unified back in English.
- All English terms are either italicized or inside quotation marks following RAE's rules.
- Likes and dislikes names have at least once the official translation from Google (I personally think they should all be changed to the official translation from Google, with the exception of the extension name).
- Removed quite a few typos with accents.
- Corrected a couple of discrepancies between the translated texts and the current English texts.
English text updates:
- Fixed some words that needed uppercasing.
- Adding a missing colon in the API page, for unification purposes.
- Adding a missing "and" in the FAQ page.
Localization updates:
- The unlocalizable strings in the Settings page of the extension should be localizable now.
