Deprecate KDE4 software in categories graphics-textproc.

The last upstream release supporting KDE4 was 10 months ago,

https://www.kde.org/announcements/announce-applications-17.08.3.php ,

and the kde@ team for FreeBSD has supported modern KDE (i.e. KDE
Frameworks, Plasma 5 and KDE Applications) for 4 months. Give a 4
month deprecation period to allow users to switch over.

Also deprecated: multimedia/kmplayer-kde4 (permission from jhale@)
Not deprecated, need to contact maintainers:

misc/krecipes-kde4
net-im/kmess-kde4
net/smb4k-kde4
textproc/uim-kde4