clean up styles a bit

- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/Main.js#L6
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/AddValueToList.js#L25-L42

- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/CreateIngredientsList.js#L76-L145
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/CreateNewGrocry.js#L26-L46
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/IngredientDetails.js#L119-L146
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/Todo.js#L61
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/index.js#L49-L57
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/introSlider.js#L9-L17
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/introSlider.js#L26
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/introSlider.js#L33
- [ ] https://github.com/GroceriStar/react-native-shoppin-list/blob/master/src/components/layouts/introSlider.js#L47-L55

Fix for each checkbox should be a separated commit, in order to not break things that other developer working on

Review the referenced ranges in src/Main.js and the listed files under src/components/layouts, starting with the first unchecked location. Identify the style cleanup intended at each location and address each checkbox in a separate commit. Done means all listed checkboxes have been handled without combining their commits.

Written by the indexing model from the issue text.