T9142: Update userbase.kde.org and remove outdated information

[farid a.]

afarid added a comment.


  Here are some Kdenlive one's if you like to use.
  
  F6430618: download-slide-1024x576.png <https://phabricator.kde.org/F6430618>
  
  F6430617: Screenshot_20181109_105951-1024x640.png <https://phabricator.kde.org/F6430617>
  
  F6430621: screenshot17-12-1024x547.png <https://phabricator.kde.org/F6430621>

TASK DETAIL
  https://phabricator.kde.org/T9142

To: afarid
Cc: afarid, neofytosk, yurchor, ognarb, #documentation, #kde_promo, xyquadrat, alexde, davidc, Anachronox, nauticalnexus, James, nalmeida, skadinna, rgomezantoli, s8321414, jriddell, tcanabrava, lydia, valorie, sebas, apol, ltoscano, repinc
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