Punctuation internationalization issue in preference page

[nicmart-dev]

You should include the colon as part of the string, for this and other applicable strings, as punctuation rules differ (eg. in French we need a non breaking space before those):

eg.

        "recipe.cookingTime": "Cooking Time:",

Originally posted by @nicmart-dev in #41 (comment)

[nicmart-dev]

@yaacovkdev Please check if still outstanding, but not a blocker for initial release.