v2021.03.31 - Gui appearance update and small fixes

Updated Gui appearance:

• gave each item stack more information
• standardized gui item stack layout
• adjusted config gui layout with the rest of the gui
• added option to reload configs from disk
• added option to go back in config and copy action
• added option to abort copy action

Changes:

• The plugin now warns when you try to set the vein size to 2 or lower.

Fixes:

• Fixed a bug where templates aren't visible in the gui
• Fixed a bug which causes a server crash when using a world with the name default

Notes:

• Because of the huge changes, the gui is no longer available in chines (The command messages are still available in chines)