Add functionality - change password
Account settings changed. Added popup. Colors refactor.
Added templete for finances settings. Small clearance in mainPanel.
Added delete button to monthly finances.
Merge pull request #71 from Maciekek/dev/#55

Dev/#55
Fix action event - password changed.
Manage account finance settings.
implement - user can delete obligation.
Fix pop-up messages.
Add functionality - change password
Merge brancha #51.