Added ticket solver view Fixed some interface bugs

- Added ticket solver view (Panel_Tickets.java)
- Added Panel_Ticket in order to show ticket title and date
- Fixed problem that caused font to be to small after using system look
  and feel for the login view
- Added new resources (Strings and colors)
- Fixed bug on swapablePanel that would cause an exception due to key not
  existing
- Added variables Class where all the trouble tickets should be stored in
  memory