Reset PIM defaults when changing volume KDF

A SourceForge report pointed out that the password-change and header-KDF dialogs reused the current custom PIM when the user selected a different KDF. That was harmless when all choices used the same PBKDF2 PIM scale, but it is wrong with Argon2 because the same numeric PIM has different security and performance meaning.

Avoid silently carrying a custom PIM across KDF changes in both the Windows and wx dialogs. If the new KDF differs from the current one and the user has not explicitly opened the New PIM field, use the default PIM for the selected KDF instead. Keep preserving the current PIM when the KDF is unchanged.

Enable explicit New PIM entry in the header KDF-only flow, warn before resetting an existing custom PIM to the new KDF default, and validate explicitly entered KDF-only PIM values.

Report the new KDF from the Windows dialog as well as the new PIM so favorite volumes update both stored PIM and pinned KDF metadata after password or header KDF changes, including system favorites. Add translation fallbacks, documentation, and release notes for the new behavior.

Translations/Language.ko.xml

@@ -1684,6 +1684,8 @@
     <entry lang="ko" key="MACOSX_APFS_SYSTEM_STORE">선택한 APFS 물리적 저장소 '{0}'에는 현재 마운트된 macOS 시스템 볼륨이 포함되어 있으므로 VeraCrypt 볼륨 호스트로 사용할 수 없습니다.</entry>
     <entry lang="ko" key="MACOSX_DEVICE_NOT_WRITABLE">macOS에서 선택한 장치 '{0}'을 읽기 전용으로 보고했습니다. 쓰기 가능한 물리적 파티션 또는 디스크를 선택하세요.</entry>
     <entry lang="ko" key="MACOSX_APFS_EROFS_HINT">macOS에서 선택한 장치를 읽기 전용으로 보고했습니다. APFS 디스크인 경우 APFS 합성 볼륨이 아니라 물리적 APFS 저장소 파티션을 선택했는지 확인하세요. 디스크 유틸리티 또는 'diskutil list'를 사용하여 물리적 파티션을 식별한 다음 다시 시도하세요.</entry>
+    <entry lang="en" key="FAVORITE_PIM_OR_KDF_CHANGED">This volume is registered as a System Favorite and its PIM and/or KDF settings were changed.\nDo you want VeraCrypt to automatically update the System Favorite configuration (administrator privileges required)?\n\nPlease note that if you answer no, you'll have to update the System Favorite manually.</entry>
+    <entry lang="en" key="PIM_RESET_ON_KDF_CHANGE_CONFIRM">The selected KDF uses different PIM parameters, so VeraCrypt will not reuse the current custom PIM. The new volume header will use the default PIM for the selected KDF unless you select "Use PIM" in the New section and enter a custom value.\n\nDo you want to continue?</entry>
   </localization>
   <xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
     <xs:element name="VeraCrypt">