Cleaning up a few more bugs. For details on the main release, see the 4.0.0 release notes.

Bug Fixes

[#4340] Fixed equipment description tab displaying AC for non-armor items
[#4418] Cantrips should no longer count towards prepared spells count
[#4423] Subclasses that grant spellcasting now track prepared spells properly
[#4428] Fixed error with editing an item after dragging a copy to another sheet
[#4431] Fixed subclass table in journal pages not displaying scale value changes at levels without features
[#4435] Usage of deprecated consumption hooks should no longer throw error
[#4436] Tool IDs can now be modified using mergeObject, in addition to direct assignment
[#4441] Fixed weird header height in minimized compendium browser
[#4445] Fixed consumption button in chat no respecting activity uses consumption
[#4446] Concentrations sources should now display properly in activity usage dialog
[#4448] Posting item without activities into chat should no longer display deprecation warnings
[#4453] Fixed class journal page displaying class's expertise instead of proficiency if created first
[#4455] Break Concentration context menu option should now work from the spellbook tab

Improvements

[#4388] Older system.abilities enchantments will now properly modify ability on attack activities
[#4413] Activities on locked items can now be dragged

Many thanks to the following contributors: @arbron, @MrPrimate

Installation: To manually install this release, please use the following manifest URL: https://github.com/foundryvtt/dnd5e/releases/download/release-4.0.4/system.json