Improve styling of Search view and Search filters:
- Adjust offset margins to the rest of the UI views within the app;
- Add font-weight 700 to Search button and increase font-size of icons within buttons;
- Add a caret pointing up in the border-top when filters are displayed;
- Add font-weight for labels (700);
- Review spacing and font-size for Content-type dropdown;
- Update Custom range modal based on defined Ui standards for modals already implemented in the UI (center alignment & bolded font-weight for primary action).