* index page: margin top is 24% of the view port.
avoid to scroll a small screen,
center the content in the middle of the screen
* link to preferences at the same height same the input fields
* increase the category tab heighs
* increase the margin bottom of the query field
* in the results, change the h3 margin top and bottom to 0.4rem (6px)
* move the back to top button slightly on the right when the results are only images
When an image is selected, the detail with the full size image is displayed
on the right side of the screen (or full screen on tablet and phone).
When Javascript is disabled, the thumbnail is a linked to the full size image,
as it was before.
When the image proxy is enabled, the full size image is also proxied,
in consequence this commit increases the bandwidth usage of instances.
The detail can be closed by the close button or the Esc key.
It is possible to go to the next and previous images using the j and k keys
or the button on the top right of the screen.
* clean up vars in defenition
* results look now the same on mobile and desktop
* reworked results on mobile
* new color theme with more vibrant colors
* remove vars and add elements to base and btn vars
* change default border radius to 10px and padding to 0.7em
* put border radius and padding on search input form, infoxbox and buttons
* remove unused .help class in #categories_container
* remove active background from tabs to straemline design
* redo search form: 10px padding
* 2rem margin on search results on desktop
* fix modal pacement of engine reliability in prefs
* use darker accent colors
* streamline autocomplete with more padding and a hover effect
- using more rem in style and definitions
- mobile width in preferences.less fix max-width: 75em to 80em (normalized with
style.less and other)
- do not display #backToTop position on tablet (when max-width: 80em)
- fix answer box on mobile (when max-width: 50em)
