user profile section updated
admin user panel updated
updated - first name and last name in account creation and editing
updated - first name and last name in the top bar
added - language selector
added - language code and finnish translation to some parts of the site
updated - language selector functionality works fine
updated - so that only tasks are draggable and nothing else in the list
fixed - issues caused by the previous update
updated - allowed empty dates, changes made to DB, php and javascript