Delete all button for Damage Meter Snapshots + Minor fixes

Added

• Now all Damage Meter Snapshots can be deleted at once with one button #262

Changed

• Update es-ES.xml by @NuberuSH in #261
• Update DownloadItemJsonFilesManually.bat by @PurpleGale in #263
• Update zh-CN.xml by @kkkingim in #265
• Update pl-PL.xml by @arabinos in #267
• Update zh-CN.xml by @kkkingim in #268

Fixed

• Tool settings are now also saved when the PC is shut down and the tool is still active
• Player kills are displayed correctly in the notifications again

Full Changelog: v5.18.1...v5.18.2