minor debuff

Introduce the concept of minor debuffs:

1. buffs, major debuffs and minor debuffs are displayed seperately in 3 lines
2. cleanse talents that remove cross-tier effects instead remove several minor debuffs
3. many unspecified cleanse talents will try remove major debuffs first
4. some 'other' debuffs are classified as physical, magical or mental minor debuff
5. add some pre-defined effect filters