Fix mixed-use-of-spaces-and-tabs.
    
    - Fix desktop-file-install sriptlet.
    - Fix license tag.
    - Removed trailing spaces.
    - Removed libsmb4kcore.so (devel-file) reverts fix of internal broken dependencies.
    - Update smb4k.appdata.xml in smb4k-1.2.0_fixbuild.patch .
    - Added a subpackage with kde-plasma-smb4k.
    - Fixed unused-direct-shlib-dependency in cmake with global optflags.