Moved addon:ResetGUI() fron ARLFrame.lua to ARLConfig.lua as a file-local function, since it is only used there from the config options.

Moved addon:ResetGUI() fron ARLFrame.lua to ARLConfig.lua as a file-local function, since it is only used there from the config options.
Moved the player profession-setting code from addon:OnEnable() to Player.lua as Player:SetProfessions() with a slight re-write - at some point this should be used when a player learns/unlearns professions.
Added some TODO comments throughout the code for variables set on the Player table which have no current use, and for functions which should be used for more than their current context.