Tweaks to the ability system and ability targeters.

[MistakeNot4892]

• Renames apply_effect() and apply_effect_to() to apply_ability_effect() and apply_ability_effect_to() to distinguish from other procs.
• Removes get_turf() in ability code preventing targeting non-turf atoms specifically.
• Adjusted ability list to sit flush with the right side of the screen, under z-level awareness element.
• Minor adjustments/fixes to targeters.