SMPAuction - Shulker - SignAPI v4.0

• fixed gui related delay

• fixed shulker preview issues
• added %amount% placeholder to messages.yml

• fixed issues with purchase handling in some cases

• added support for ExcellentEconomy
• improvied the shulker box buy/sell gui for better view
• fixed known issues

• fixed sort search reset issue

• fixed search reset issue in some cases
• fixed minor bugs

• fixed renamed sell issue in some cases

• fixed gui issue with custom config