As a user, I want Patat to use attractive UI components

As a result of attractiveness metrics measurement, some issues related to the interface of Patat were reported.
* Not enough contrast in colors.
* Non-existing interactiveness of components (meaning that the user does not get any feedback from Patat with respect to their current position in the menu, e.g. the user is on the page "Menu" at the moment).
* Items in the pagination bar are too small and the functionality behind them is not intuitive (suggestion: add a cursor).
* Layout of the items in the dish description is not pretty enough.

# Tasks
- [x] Red the current page in the navigation bar
- [x] Add a cursor to the pagination bar
- [ ] Play with colors