Add missing dependencies in CMakeLists.txt

Add missing dependencies in target_link_libraries() cmake macro here and there.
Added dependencies comes from #include<> directives for specific headers, like
for instance having #include<kmessagebox.h> but not specifying KF5::WidgetsAddons.

Additionally, I've moved the add_includedirs() macro in sheets/CMakeLists.txt
inside the ifdef PART_SHEETS, otherwise the eigen3 include directory variable may
not be set, when configuring without part_sheets and cmake fails in that case.

Reviewed By: leinir

Differential Revision: https://phabricator.kde.org/D15236