It will replace kwallet in the future. Windows improvment support

CMakeLists.txt

@@ -46,6 +46,13 @@ find_package(KF5AkonadiMime ${AKONADIMIME_LIB_VERSION} CONFIG REQUIRED)
 find_package(KPimSMTP ${KSMTP_LIB_VERSION} CONFIG REQUIRED)
 find_package(KPimGAPI ${KGAPI_LIB_VERSION} CONFIG REQUIRED)
 
+#it will replace kwallet support
+find_package(Qt5Keychain CONFIG)
+set_package_properties(Qt5Keychain PROPERTIES
+                                   DESCRIPTION "Provides support for secure credentials storage"
+                                   URL "https://github.com/frankosterfeld/qtkeychain"
+                                   TYPE OPTIONAL)
+
 option(KDEPIM_RUN_AKONADI_TEST "Enable autotest based on Akonadi." TRUE)
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050f00)
 add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x054C00)