Habitica: [API v3] Mistakes in new notification texts

[Blablux]

There is now a new notification when selling items, but depending on the case, its text contains some minor mistakes:

No space between _Pet_ and _Cub_, and _eggs_ is plural but only one can be sold at a time.

No space between _hatching_ and _Potions_, and _Potions_ is plural but only one can be sold at a time.

[Blablux]

Found a few more new notifications that looks ... wrong:

No caps for _birthday_, _greeting_ and _thankyou_, and no space in _thankyou_.

[ghost]

I haven't tested it on production, but buying a saddle gives notification about "buying saddle food"

[Blablux]

Purchasing quests are missing an _a_ in _purchased_. Also, some quests titles seems odd.

[paglias]

I think we're passing the item's keys instead of translated name...

[quin-jay]

Just wanted to confirm the same behavior when _purchasing_ eggs as well (including the typo mentioned by @Blablux):

[ghost]

Just noticed the typo in _purchased_ (purchsed) on the screen shots. Is it also there on production?

[quin-jay]

@GitHubSphinx Right now there are no notifications in the live/production site, whether for confirming sale of an item or purchase of any item

[Wariannem]

When using the website in another language (tested french) the notification comes twice and in different versions for feeding pets. For purchasing the notification comes in english with the typo mentioned earlier by @GitHubSphinx and @Blablux.

[paglias]

@Alys should these new notifications removed (you purchase a ..., you sold a ...)

[paglias]

Removed 2 strings and fixed the error with non english languages