Added more missing strings

src/main/resources/locale/locale_en_US.properties

@@ -629,6 +629,7 @@ Commands.Usage.Rate=rate
 Commands.Usage.Skill=skill
 Commands.Usage.SubSkill=subskill
 Commands.Usage.XP=xp
+Commands.Description.mmoinfo=Read details about a skill or mechanic.
 Commands.MmoInfo.NoMatch=That subskill doesn't exist!
 Commands.MmoInfo.Header=[[DARK_AQUA]]-=[]=====[][[GOLD]] MMO Info [[DARK_AQUA]][]=====[]=-
 Commands.MmoInfo.SubSkillHeader=[[GOLD]]Name:[[YELLOW]] {0}