Make dependency on KI18n explicit

It already pulled in by KParts, but we better not rely on that

src/CMakeLists.txt

@@ -387,6 +387,7 @@ pim_target_precompile_headers(kmailpart PUBLIC ../kmail_pch.h)
 
 target_link_libraries(kmailpart
     kmailprivate
+    KF5::I18n
     KF5::PimCommon
     KF5::KCMUtils
     KF5::Parts

src/kontactplugin/kmail/CMakeLists.txt

@@ -18,7 +18,7 @@ add_library(kontact_kmailplugin MODULE ${kontact_kmailplugin_PART_SRCS})
 pim_target_precompile_headers(kontact_kmailplugin PUBLIC ../../../kmail_pch.h)
 add_dependencies(kontact_kmailplugin kmail_xml)
 
-target_link_libraries(kontact_kmailplugin KF5::Mime  KF5::KontactInterface KF5::CalendarCore KF5::CalendarUtils KF5::AkonadiCore KF5::Contacts KF5::AkonadiWidgets)
+target_link_libraries(kontact_kmailplugin KF5::Mime KF5::I18n KF5::KontactInterface KF5::CalendarCore KF5::CalendarUtils KF5::AkonadiCore KF5::Contacts KF5::AkonadiWidgets)
 
 ########### next target ###############
 

src/kontactplugin/summary/CMakeLists.txt

@@ -9,7 +9,7 @@ add_library(kontact_summaryplugin MODULE ${kontact_summaryplugin_PART_SRCS})
 pim_target_precompile_headers(kontact_summaryplugin PUBLIC ../../../kmail_pch.h)
 add_dependencies(kontact_summaryplugin kmail_xml)
 
-target_link_libraries(kontact_summaryplugin KF5::KCMUtils  KF5::IdentityManagement KF5::KontactInterface KF5::PimCommon KF5::ConfigCore)
+target_link_libraries(kontact_summaryplugin KF5::KCMUtils KF5::I18n KF5::IdentityManagement KF5::KontactInterface KF5::PimCommon KF5::ConfigCore)
 
 kcoreaddons_desktop_to_json(kontact_summaryplugin summaryplugin.desktop)
 
@@ -20,7 +20,7 @@ set(kcm_kontactsummary_PART_SRCS kcmkontactsummary.cpp)
 add_library(kcm_kontactsummary MODULE ${kcm_kontactsummary_PART_SRCS})
 pim_target_precompile_headers(kcm_kontactsummary PUBLIC ../../../kmail_pch.h)
 
-target_link_libraries(kcm_kontactsummary KF5::KCMUtils Qt::Widgets KF5::KCMUtils KF5::I18n KF5::KontactInterface)
+target_link_libraries(kcm_kontactsummary KF5::I18n KF5::KCMUtils Qt::Widgets KF5::KCMUtils KF5::I18n KF5::KontactInterface)
 
 ########### install files ###############