show/hide viewsort controls on topbar hover or show_search
Remove uneccessary hoverfield and container divs, clean up CSS.
Remove redundent CSS according to @tilgovi's suggestions.
Greatly simplified code using angular animation and ng-show
Remove ng-class='hidden' from dropdown menus.

Add ng-show="$parent.show_view_sort" to prevent menu being visible if you forget to close it.
Merge pull request #1111 from RawKStar77/hideviewsort2

Improve CSS for viewsort controls