[kde-apps/thumbnailers] Update for KDE Applications.

Package-Manager: portage-2.2.14
[kde-apps/libtaskmanager] Remove bogus package.
[kde-apps/krunner] Remove bogus package.
[kde-apps/kfind] Update for KDE Applications.

Package-Manager: portage-2.2.14
[eclass] Blacklist nepomuk-widgets.
[kde-base] Rename kdepim 9999 -> 4.9999 since master is now KF5.
[kde-base] Remove old KDE 4 live ebuilds.