Corrected an error in the navbar with an ng-show attribute. Taller dropdown menu entries.

The way it was before, dropdown menu entries weren't tall enough, and when using a tactile interface sometimes the user clicked on the wrong one.
Taller entries in select menus.

The select menu tag is used for selecting the user's default language and his timezone. The entries in the menu weren't tall enough and sometimes it was hard to click on the right one using a tactile interface.