added border around text in tooltip
added border around text in tooltip

mihailim/PoESkillTree,Yskuma/PoESkillTree,l0g0sys/PoESkillTree,PoESkillTree/PoESkillTree,brather1ng/PoESkillTree,nikibobi/PoESkillTree,EmmittJ/PoESkillTree,BlueManiac/PoESkillTreeSource,MLanghof/PoESkillTree