Checks if the Trade Skill UI is open for a profession in the guild.
isGuild = C_TradeSkillUI.IsTradeSkillGuild()
- Boolean - true if the Trade Skill UI is open for a profession in the guild, false otherwise.
- This function will typically only be true if 'View All' has been clicked for a profession in the 'Professions' view of the guild roster.
- Patch 7.0.3 (2016-07-19): Added.