Improves application's UI being more responsive and intuitive

During development the application's responsive nature (it working on tablets and phones too) got a bit left bind. Therefore, this pull-requests deals with changes and improving a few UI related things. 

- [x] Change Layout of flags
- [x] Dishes view and font alignment
- [x] Fixes the big star
- [x] Scroll to top button
- [x] Align bee-line and price in dishes view to top, use same font
- [x] De-uglify the "My Favorites" bar especially the borders
- [ ] <del>Move remove dish button away from add dish button</del>
   - <del>Hard as both are styled by bootstrap as a button-bar</del>
- [x] Add alert to ask if dish should truly be deleted
   - Alerts are so 90s and are yucks on mobile but I'll add one :smile: 
- [x] Remove unused sass styles as nobody cares about 'em

@anna-averianova, @danidanone17, @konstantinos-chronis, @Guido46 feel free to note and add everything UI related you find in the app which bothers you!

Close #73