added level requirements for moving between the perk slots

[itzandroidtab]

Fixes issues #96, #96, #93, #84 and #82

Solved by removing the default values for the perks except the first one and adding a level check before we move the perks. This also fixes the issue where the level requirement is shown incorrectly.

#82 is caused by prefilling the perks. These should be removed from the database before this is solved on older characters. On new characters this should be solved.