Grid

- non-inverted health bar colors now use a darker version of the class color as background color
- tweaked option dialogue language and arrangement
- more arrow settings
- improved name display settings
- added health text related settings
- tons of color settings (need an external color picker for now)
- added setting to disable aggro tracking
- minor setting cleanup
- fixed debuff indicator not being on top
- slightly optimized aggro tracking
- fixed /grid resize crash (and limited it to the player cell)